Home / 129,140.56-178,223.22-72,551.92

Finding the Fourth Proportional to 129,140.56, 178,223.22 and 72,551.92

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Solution

The fourth proportional to 129,140.56, 178,223.22 and 72,551.92 is: 100,126.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,140.56 : 178,223.22 = 72,551.92 : x
  2. Step 2: Convert to fraction form
    129,140.56/178,223.22 = 72,551.92/x
  3. Step 3: Cross multiply
    129,140.56x = 178,223.22 × 72,551.92
  4. Step 4: Simplify right side
    129,140.56x = 12,930,436,799.58
  5. Step 5: Solve for x
    x = 12,930,436,799.58/129,140.56
  6. Step 6: Final answer
    x = 100,126.84

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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.