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Finding the Fourth Proportional to 91,042.92, 125,639.31 and 50,755.87

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Solution

The fourth proportional to 91,042.92, 125,639.31 and 50,755.87 is: 70,043.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,042.92 : 125,639.31 = 50,755.87 : x
  2. Step 2: Convert to fraction form
    91,042.92/125,639.31 = 50,755.87/x
  3. Step 3: Cross multiply
    91,042.92x = 125,639.31 × 50,755.87
  4. Step 4: Simplify right side
    91,042.92x = 6,376,932,231.47
  5. Step 5: Solve for x
    x = 6,376,932,231.47/91,042.92
  6. Step 6: Final answer
    x = 70,043.15

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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.