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Finding the Fourth Proportional to 77,265.92, 115,898.88 and 40,321.28

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Solution

The fourth proportional to 77,265.92, 115,898.88 and 40,321.28 is: 60,481.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,265.92 : 115,898.88 = 40,321.28 : x
  2. Step 2: Convert to fraction form
    77,265.92/115,898.88 = 40,321.28/x
  3. Step 3: Cross multiply
    77,265.92x = 115,898.88 × 40,321.28
  4. Step 4: Simplify right side
    77,265.92x = 4,673,191,192.17
  5. Step 5: Solve for x
    x = 4,673,191,192.17/77,265.92
  6. Step 6: Final answer
    x = 60,481.92

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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.