Home / 71,385.61-98,512.25-39,115.10

Finding the Fourth Proportional to 71,385.61, 98,512.25 and 39,115.10

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Solution

The fourth proportional to 71,385.61, 98,512.25 and 39,115.10 is: 53,978.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,385.61 : 98,512.25 = 39,115.10 : x
  2. Step 2: Convert to fraction form
    71,385.61/98,512.25 = 39,115.10/x
  3. Step 3: Cross multiply
    71,385.61x = 98,512.25 × 39,115.10
  4. Step 4: Simplify right side
    71,385.61x = 3,853,316,017.41
  5. Step 5: Solve for x
    x = 3,853,316,017.41/71,385.61
  6. Step 6: Final answer
    x = 53,978.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.