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Finding the Fourth Proportional to 136,853.72, 205,251.24 and 79,889.68

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Solution

The fourth proportional to 136,853.72, 205,251.24 and 79,889.68 is: 119,817.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,853.72 : 205,251.24 = 79,889.68 : x
  2. Step 2: Convert to fraction form
    136,853.72/205,251.24 = 79,889.68/x
  3. Step 3: Cross multiply
    136,853.72x = 205,251.24 × 79,889.68
  4. Step 4: Simplify right side
    136,853.72x = 16,397,455,883.20
  5. Step 5: Solve for x
    x = 16,397,455,883.20/136,853.72
  6. Step 6: Final answer
    x = 119,817.39

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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.