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Finding the Fourth Proportional to 80,981.76, 121,472.64 and 41,513.70

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Solution

The fourth proportional to 80,981.76, 121,472.64 and 41,513.70 is: 62,270.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,981.76 : 121,472.64 = 41,513.70 : x
  2. Step 2: Convert to fraction form
    80,981.76/121,472.64 = 41,513.70/x
  3. Step 3: Cross multiply
    80,981.76x = 121,472.64 × 41,513.70
  4. Step 4: Simplify right side
    80,981.76x = 5,042,778,735.17
  5. Step 5: Solve for x
    x = 5,042,778,735.17/80,981.76
  6. Step 6: Final answer
    x = 62,270.55

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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.