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Finding the Fourth Proportional to 71,390.72, 98,519.92 and 39,560.32

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Solution

The fourth proportional to 71,390.72, 98,519.92 and 39,560.32 is: 54,593.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,390.72 : 98,519.92 = 39,560.32 : x
  2. Step 2: Convert to fraction form
    71,390.72/98,519.92 = 39,560.32/x
  3. Step 3: Cross multiply
    71,390.72x = 98,519.92 × 39,560.32
  4. Step 4: Simplify right side
    71,390.72x = 3,897,479,561.57
  5. Step 5: Solve for x
    x = 3,897,479,561.57/71,390.72
  6. Step 6: Final answer
    x = 54,593.64

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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.