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Finding the Fourth Proportional to 80,737.63, 120,876 and 64,121.29

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Solution

The fourth proportional to 80,737.63, 120,876 and 64,121.29 is: 95,998.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,737.63 : 120,876 = 64,121.29 : x
  2. Step 2: Convert to fraction form
    80,737.63/120,876 = 64,121.29/x
  3. Step 3: Cross multiply
    80,737.63x = 120,876 × 64,121.29
  4. Step 4: Simplify right side
    80,737.63x = 7,750,725,050.04
  5. Step 5: Solve for x
    x = 7,750,725,050.04/80,737.63
  6. Step 6: Final answer
    x = 95,998.92

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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.