Home / 129,144.76-178,223.07-71,000.79

Finding the Fourth Proportional to 129,144.76, 178,223.07 and 71,000.79

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Solution

The fourth proportional to 129,144.76, 178,223.07 and 71,000.79 is: 97,982.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,144.76 : 178,223.07 = 71,000.79 : x
  2. Step 2: Convert to fraction form
    129,144.76/178,223.07 = 71,000.79/x
  3. Step 3: Cross multiply
    129,144.76x = 178,223.07 × 71,000.79
  4. Step 4: Simplify right side
    129,144.76x = 12,653,978,766.23
  5. Step 5: Solve for x
    x = 12,653,978,766.23/129,144.76
  6. Step 6: Final answer
    x = 97,982.91

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1.5x scale

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.