Home / 129,104.89-178,160.01-71,747.78

Finding the Fourth Proportional to 129,104.89, 178,160.01 and 71,747.78

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Solution

The fourth proportional to 129,104.89, 178,160.01 and 71,747.78 is: 99,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,104.89 : 178,160.01 = 71,747.78 : x
  2. Step 2: Convert to fraction form
    129,104.89/178,160.01 = 71,747.78/x
  3. Step 3: Cross multiply
    129,104.89x = 178,160.01 × 71,747.78
  4. Step 4: Simplify right side
    129,104.89x = 12,782,584,042.42
  5. Step 5: Solve for x
    x = 12,782,584,042.42/129,104.89
  6. Step 6: Final answer
    x = 99,009.30

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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.