Home / 129,112.23-178,147.24-75,372.85

Finding the Fourth Proportional to 129,112.23, 178,147.24 and 75,372.85

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Solution

The fourth proportional to 129,112.23, 178,147.24 and 75,372.85 is: 103,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,112.23 : 178,147.24 = 75,372.85 : x
  2. Step 2: Convert to fraction form
    129,112.23/178,147.24 = 75,372.85/x
  3. Step 3: Cross multiply
    129,112.23x = 178,147.24 × 75,372.85
  4. Step 4: Simplify right side
    129,112.23x = 13,427,465,198.43
  5. Step 5: Solve for x
    x = 13,427,465,198.43/129,112.23
  6. Step 6: Final answer
    x = 103,998.40

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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.