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Finding the Fourth Proportional to 129,325.85, 178,467.94 and 72,737.22

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Solution

The fourth proportional to 129,325.85, 178,467.94 and 72,737.22 is: 100,376.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,325.85 : 178,467.94 = 72,737.22 : x
  2. Step 2: Convert to fraction form
    129,325.85/178,467.94 = 72,737.22/x
  3. Step 3: Cross multiply
    129,325.85x = 178,467.94 × 72,737.22
  4. Step 4: Simplify right side
    129,325.85x = 12,981,262,574.90
  5. Step 5: Solve for x
    x = 12,981,262,574.90/129,325.85
  6. Step 6: Final answer
    x = 100,376.40

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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.