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Finding the Fourth Proportional to 239,659.92, 359,489.82 and 81,889.74

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Solution

The fourth proportional to 239,659.92, 359,489.82 and 81,889.74 is: 122,834.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,659.92 : 359,489.82 = 81,889.74 : x
  2. Step 2: Convert to fraction form
    239,659.92/359,489.82 = 81,889.74/x
  3. Step 3: Cross multiply
    239,659.92x = 359,489.82 × 81,889.74
  4. Step 4: Simplify right side
    239,659.92x = 29,438,527,892.45
  5. Step 5: Solve for x
    x = 29,438,527,892.45/239,659.92
  6. Step 6: Final answer
    x = 122,834.59

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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.