Home / 129,310.03-178,446.67-72,721.81

Finding the Fourth Proportional to 129,310.03, 178,446.67 and 72,721.81

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Solution

The fourth proportional to 129,310.03, 178,446.67 and 72,721.81 is: 100,355.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,310.03 : 178,446.67 = 72,721.81 : x
  2. Step 2: Convert to fraction form
    129,310.03/178,446.67 = 72,721.81/x
  3. Step 3: Cross multiply
    129,310.03x = 178,446.67 × 72,721.81
  4. Step 4: Simplify right side
    129,310.03x = 12,976,964,830.87
  5. Step 5: Solve for x
    x = 12,976,964,830.87/129,310.03
  6. Step 6: Final answer
    x = 100,355.44

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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.