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Finding the Fourth Proportional to 71,487.32, 98,652.48 and 39,656.12

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Solution

The fourth proportional to 71,487.32, 98,652.48 and 39,656.12 is: 54,725.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,487.32 : 98,652.48 = 39,656.12 : x
  2. Step 2: Convert to fraction form
    71,487.32/98,652.48 = 39,656.12/x
  3. Step 3: Cross multiply
    71,487.32x = 98,652.48 × 39,656.12
  4. Step 4: Simplify right side
    71,487.32x = 3,912,174,585.18
  5. Step 5: Solve for x
    x = 3,912,174,585.18/71,487.32
  6. Step 6: Final answer
    x = 54,725.43

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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.