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Finding the Fourth Proportional to 159,937.89, 239,764.28 and 81,011.49

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Solution

The fourth proportional to 159,937.89, 239,764.28 and 81,011.49 is: 121,445.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,937.89 : 239,764.28 = 81,011.49 : x
  2. Step 2: Convert to fraction form
    159,937.89/239,764.28 = 81,011.49/x
  3. Step 3: Cross multiply
    159,937.89x = 239,764.28 × 81,011.49
  4. Step 4: Simplify right side
    159,937.89x = 19,423,661,166.52
  5. Step 5: Solve for x
    x = 19,423,661,166.52/159,937.89
  6. Step 6: Final answer
    x = 121,445.03

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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.