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Finding the Fourth Proportional to 239,598.92, 359,430.78 and 81,785

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Solution

The fourth proportional to 239,598.92, 359,430.78 and 81,785 is: 122,688.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,598.92 : 359,430.78 = 81,785 : x
  2. Step 2: Convert to fraction form
    239,598.92/359,430.78 = 81,785/x
  3. Step 3: Cross multiply
    239,598.92x = 359,430.78 × 81,785
  4. Step 4: Simplify right side
    239,598.92x = 29,396,046,342.30
  5. Step 5: Solve for x
    x = 29,396,046,342.30/239,598.92
  6. Step 6: Final answer
    x = 122,688.56

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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.