Home / 129,540.38-178,763.04-72,179.48

Finding the Fourth Proportional to 129,540.38, 178,763.04 and 72,179.48

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Solution

The fourth proportional to 129,540.38, 178,763.04 and 72,179.48 is: 99,606.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,540.38 : 178,763.04 = 72,179.48 : x
  2. Step 2: Convert to fraction form
    129,540.38/178,763.04 = 72,179.48/x
  3. Step 3: Cross multiply
    129,540.38x = 178,763.04 × 72,179.48
  4. Step 4: Simplify right side
    129,540.38x = 12,903,023,270.42
  5. Step 5: Solve for x
    x = 12,903,023,270.42/129,540.38
  6. Step 6: Final answer
    x = 99,606.19

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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.