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Finding the Fourth Proportional to 86,294.52, 129,456.54 and 39,551.40

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Solution

The fourth proportional to 86,294.52, 129,456.54 and 39,551.40 is: 59,333.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,294.52 : 129,456.54 = 39,551.40 : x
  2. Step 2: Convert to fraction form
    86,294.52/129,456.54 = 39,551.40/x
  3. Step 3: Cross multiply
    86,294.52x = 129,456.54 × 39,551.40
  4. Step 4: Simplify right side
    86,294.52x = 5,120,187,396.16
  5. Step 5: Solve for x
    x = 5,120,187,396.16/86,294.52
  6. Step 6: Final answer
    x = 59,333.86

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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.