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Finding the Fourth Proportional to 159,174.39, 219,691.86 and 91,236.90

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Solution

The fourth proportional to 159,174.39, 219,691.86 and 91,236.90 is: 125,924.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,174.39 : 219,691.86 = 91,236.90 : x
  2. Step 2: Convert to fraction form
    159,174.39/219,691.86 = 91,236.90/x
  3. Step 3: Cross multiply
    159,174.39x = 219,691.86 × 91,236.90
  4. Step 4: Simplify right side
    159,174.39x = 20,044,004,261.63
  5. Step 5: Solve for x
    x = 20,044,004,261.63/159,174.39
  6. Step 6: Final answer
    x = 125,924.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.