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Finding the Fourth Proportional to 159,575.28, 239,159.40 and 84,731.28

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Solution

The fourth proportional to 159,575.28, 239,159.40 and 84,731.28 is: 126,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,575.28 : 239,159.40 = 84,731.28 : x
  2. Step 2: Convert to fraction form
    159,575.28/239,159.40 = 84,731.28/x
  3. Step 3: Cross multiply
    159,575.28x = 239,159.40 × 84,731.28
  4. Step 4: Simplify right side
    159,575.28x = 20,264,282,086.03
  5. Step 5: Solve for x
    x = 20,264,282,086.03/159,575.28
  6. Step 6: Final answer
    x = 126,988.85

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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.