Home / 129,197.18-178,270.49-71,834.90

Finding the Fourth Proportional to 129,197.18, 178,270.49 and 71,834.90

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Solution

The fourth proportional to 129,197.18, 178,270.49 and 71,834.90 is: 99,120.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,197.18 : 178,270.49 = 71,834.90 : x
  2. Step 2: Convert to fraction form
    129,197.18/178,270.49 = 71,834.90/x
  3. Step 3: Cross multiply
    129,197.18x = 178,270.49 × 71,834.90
  4. Step 4: Simplify right side
    129,197.18x = 12,806,042,110.34
  5. Step 5: Solve for x
    x = 12,806,042,110.34/129,197.18
  6. Step 6: Final answer
    x = 99,120.13

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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.