Home / 129,114.22-178,179.93-71,758.78

Finding the Fourth Proportional to 129,114.22, 178,179.93 and 71,758.78

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Solution

The fourth proportional to 129,114.22, 178,179.93 and 71,758.78 is: 99,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,114.22 : 178,179.93 = 71,758.78 : x
  2. Step 2: Convert to fraction form
    129,114.22/178,179.93 = 71,758.78/x
  3. Step 3: Cross multiply
    129,114.22x = 178,179.93 × 71,758.78
  4. Step 4: Simplify right side
    129,114.22x = 12,785,974,397.29
  5. Step 5: Solve for x
    x = 12,785,974,397.29/129,114.22
  6. Step 6: Final answer
    x = 99,028.40

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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.