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Finding the Fourth Proportional to 239,011.92, 358,526.45 and 81,219.87

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Solution

The fourth proportional to 239,011.92, 358,526.45 and 81,219.87 is: 121,832.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,011.92 : 358,526.45 = 81,219.87 : x
  2. Step 2: Convert to fraction form
    239,011.92/358,526.45 = 81,219.87/x
  3. Step 3: Cross multiply
    239,011.92x = 358,526.45 × 81,219.87
  4. Step 4: Simplify right side
    239,011.92x = 29,119,471,863.61
  5. Step 5: Solve for x
    x = 29,119,471,863.61/239,011.92
  6. Step 6: Final answer
    x = 121,832.72

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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.