Home / 78,149.38-117,229.48-31,402.30

Finding the Fourth Proportional to 78,149.38, 117,229.48 and 31,402.30

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Solution

The fourth proportional to 78,149.38, 117,229.48 and 31,402.30 is: 47,105.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,149.38 : 117,229.48 = 31,402.30 : x
  2. Step 2: Convert to fraction form
    78,149.38/117,229.48 = 31,402.30/x
  3. Step 3: Cross multiply
    78,149.38x = 117,229.48 × 31,402.30
  4. Step 4: Simplify right side
    78,149.38x = 3,681,275,299.80
  5. Step 5: Solve for x
    x = 3,681,275,299.80/78,149.38
  6. Step 6: Final answer
    x = 47,105.62

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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.