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Finding the Fourth Proportional to 159,749.73, 239,451.30 and 78,752.88

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Solution

The fourth proportional to 159,749.73, 239,451.30 and 78,752.88 is: 118,043.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,749.73 : 239,451.30 = 78,752.88 : x
  2. Step 2: Convert to fraction form
    159,749.73/239,451.30 = 78,752.88/x
  3. Step 3: Cross multiply
    159,749.73x = 239,451.30 × 78,752.88
  4. Step 4: Simplify right side
    159,749.73x = 18,857,479,494.74
  5. Step 5: Solve for x
    x = 18,857,479,494.74/159,749.73
  6. Step 6: Final answer
    x = 118,043.89

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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.