Home / 129,108.20-178,164.57-71,751.09

Finding the Fourth Proportional to 129,108.20, 178,164.57 and 71,751.09

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Solution

The fourth proportional to 129,108.20, 178,164.57 and 71,751.09 is: 99,013.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,108.20 : 178,164.57 = 71,751.09 : x
  2. Step 2: Convert to fraction form
    129,108.20/178,164.57 = 71,751.09/x
  3. Step 3: Cross multiply
    129,108.20x = 178,164.57 × 71,751.09
  4. Step 4: Simplify right side
    129,108.20x = 12,783,502,096.88
  5. Step 5: Solve for x
    x = 12,783,502,096.88/129,108.20
  6. Step 6: Final answer
    x = 99,013.87

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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.