Home / 81,899,425,036.80-122,849,137,555.20-72,430,421,875.20

Finding the Fourth Proportional to 81,899,425,036.80, 122,849,137,555.20 and 72,430,421,875.20

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Solution

The fourth proportional to 81,899,425,036.80, 122,849,137,555.20 and 72,430,421,875.20 is: 108,645,632,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,899,425,036.80 : 122,849,137,555.20 = 72,430,421,875.20 : x
  2. Step 2: Convert to fraction form
    81,899,425,036.80/122,849,137,555.20 = 72,430,421,875.20/x
  3. Step 3: Cross multiply
    81,899,425,036.80x = 122,849,137,555.20 × 72,430,421,875.20
  4. Step 4: Simplify right side
    81,899,425,036.80x = 8,898,014,860,127,611,387,904
  5. Step 5: Solve for x
    x = 8,898,014,860,127,611,387,904/81,899,425,036.80
  6. Step 6: Final answer
    x = 108,645,632,812.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.