Home / 85,860,487.20-128,790,730.80-51,423,110.40

Finding the Fourth Proportional to 85,860,487.20, 128,790,730.80 and 51,423,110.40

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Solution

The fourth proportional to 85,860,487.20, 128,790,730.80 and 51,423,110.40 is: 77,134,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,860,487.20 : 128,790,730.80 = 51,423,110.40 : x
  2. Step 2: Convert to fraction form
    85,860,487.20/128,790,730.80 = 51,423,110.40/x
  3. Step 3: Cross multiply
    85,860,487.20x = 128,790,730.80 × 51,423,110.40
  4. Step 4: Simplify right side
    85,860,487.20x = 6,622,819,968,425,080
  5. Step 5: Solve for x
    x = 6,622,819,968,425,080/85,860,487.20
  6. Step 6: Final answer
    x = 77,134,665.60

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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.