Home / 80,537.10-120,842.10-38,400.90

Finding the Fourth Proportional to 80,537.10, 120,842.10 and 38,400.90

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Solution

The fourth proportional to 80,537.10, 120,842.10 and 38,400.90 is: 57,618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,537.10 : 120,842.10 = 38,400.90 : x
  2. Step 2: Convert to fraction form
    80,537.10/120,842.10 = 38,400.90/x
  3. Step 3: Cross multiply
    80,537.10x = 120,842.10 × 38,400.90
  4. Step 4: Simplify right side
    80,537.10x = 4,640,445,397.89
  5. Step 5: Solve for x
    x = 4,640,445,397.89/80,537.10
  6. Step 6: Final answer
    x = 57,618.73

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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.