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Finding the Fourth Proportional to 71,370.40, 98,497.20 and 39,549.28

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Solution

The fourth proportional to 71,370.40, 98,497.20 and 39,549.28 is: 54,581.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,370.40 : 98,497.20 = 39,549.28 : x
  2. Step 2: Convert to fraction form
    71,370.40/98,497.20 = 39,549.28/x
  3. Step 3: Cross multiply
    71,370.40x = 98,497.20 × 39,549.28
  4. Step 4: Simplify right side
    71,370.40x = 3,895,493,342.02
  5. Step 5: Solve for x
    x = 3,895,493,342.02/71,370.40
  6. Step 6: Final answer
    x = 54,581.36

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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.