Home / 129,144.24-178,218.09-72,555.57

Finding the Fourth Proportional to 129,144.24, 178,218.09 and 72,555.57

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Solution

The fourth proportional to 129,144.24, 178,218.09 and 72,555.57 is: 100,126.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,144.24 : 178,218.09 = 72,555.57 : x
  2. Step 2: Convert to fraction form
    129,144.24/178,218.09 = 72,555.57/x
  3. Step 3: Cross multiply
    129,144.24x = 178,218.09 × 72,555.57
  4. Step 4: Simplify right side
    129,144.24x = 12,930,715,104.26
  5. Step 5: Solve for x
    x = 12,930,715,104.26/129,144.24
  6. Step 6: Final answer
    x = 100,126.15

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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.