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Finding the Fourth Proportional to 72,486.52, 108,603.90 and 39,229.48

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Solution

The fourth proportional to 72,486.52, 108,603.90 and 39,229.48 is: 58,776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.52 : 108,603.90 = 39,229.48 : x
  2. Step 2: Convert to fraction form
    72,486.52/108,603.90 = 39,229.48/x
  3. Step 3: Cross multiply
    72,486.52x = 108,603.90 × 39,229.48
  4. Step 4: Simplify right side
    72,486.52x = 4,260,474,522.97
  5. Step 5: Solve for x
    x = 4,260,474,522.97/72,486.52
  6. Step 6: Final answer
    x = 58,776.09

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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.