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Finding the Fourth Proportional to 71,310.92, 98,406.23 and 39,479.13

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Solution

The fourth proportional to 71,310.92, 98,406.23 and 39,479.13 is: 54,479.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,310.92 : 98,406.23 = 39,479.13 : x
  2. Step 2: Convert to fraction form
    71,310.92/98,406.23 = 39,479.13/x
  3. Step 3: Cross multiply
    71,310.92x = 98,406.23 × 39,479.13
  4. Step 4: Simplify right side
    71,310.92x = 3,884,992,149.58
  5. Step 5: Solve for x
    x = 3,884,992,149.58/71,310.92
  6. Step 6: Final answer
    x = 54,479.63

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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.