Home / 129,146.30-178,220.68-71,784.12

Finding the Fourth Proportional to 129,146.30, 178,220.68 and 71,784.12

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Solution

The fourth proportional to 129,146.30, 178,220.68 and 71,784.12 is: 99,061.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,146.30 : 178,220.68 = 71,784.12 : x
  2. Step 2: Convert to fraction form
    129,146.30/178,220.68 = 71,784.12/x
  3. Step 3: Cross multiply
    129,146.30x = 178,220.68 × 71,784.12
  4. Step 4: Simplify right side
    129,146.30x = 12,793,414,679.60
  5. Step 5: Solve for x
    x = 12,793,414,679.60/129,146.30
  6. Step 6: Final answer
    x = 99,061.41

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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.