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Finding the Fourth Proportional to 136,169.64, 203,704.92 and 121,989.78

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Solution

The fourth proportional to 136,169.64, 203,704.92 and 121,989.78 is: 182,492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,169.64 : 203,704.92 = 121,989.78 : x
  2. Step 2: Convert to fraction form
    136,169.64/203,704.92 = 121,989.78/x
  3. Step 3: Cross multiply
    136,169.64x = 203,704.92 × 121,989.78
  4. Step 4: Simplify right side
    136,169.64x = 24,849,918,375.72
  5. Step 5: Solve for x
    x = 24,849,918,375.72/136,169.64
  6. Step 6: Final answer
    x = 182,492.36

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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.