Home / 129,179.16-178,251.30-74,740.68

Finding the Fourth Proportional to 129,179.16, 178,251.30 and 74,740.68

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Solution

The fourth proportional to 129,179.16, 178,251.30 and 74,740.68 is: 103,132.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,179.16 : 178,251.30 = 74,740.68 : x
  2. Step 2: Convert to fraction form
    129,179.16/178,251.30 = 74,740.68/x
  3. Step 3: Cross multiply
    129,179.16x = 178,251.30 × 74,740.68
  4. Step 4: Simplify right side
    129,179.16x = 13,322,623,372.88
  5. Step 5: Solve for x
    x = 13,322,623,372.88/129,179.16
  6. Step 6: Final answer
    x = 103,132.92

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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.