Home / 85,830,999.30-128,746,498.95-76,477,637.70

Finding the Fourth Proportional to 85,830,999.30, 128,746,498.95 and 76,477,637.70

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Solution

The fourth proportional to 85,830,999.30, 128,746,498.95 and 76,477,637.70 is: 114,716,456.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,830,999.30 : 128,746,498.95 = 76,477,637.70 : x
  2. Step 2: Convert to fraction form
    85,830,999.30/128,746,498.95 = 76,477,637.70/x
  3. Step 3: Cross multiply
    85,830,999.30x = 128,746,498.95 × 76,477,637.70
  4. Step 4: Simplify right side
    85,830,999.30x = 9,846,228,101,841,532
  5. Step 5: Solve for x
    x = 9,846,228,101,841,532/85,830,999.30
  6. Step 6: Final answer
    x = 114,716,456.55

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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.