Home / 129,350.20-178,490.64-72,760.36

Finding the Fourth Proportional to 129,350.20, 178,490.64 and 72,760.36

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Solution

The fourth proportional to 129,350.20, 178,490.64 and 72,760.36 is: 100,402.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,350.20 : 178,490.64 = 72,760.36 : x
  2. Step 2: Convert to fraction form
    129,350.20/178,490.64 = 72,760.36/x
  3. Step 3: Cross multiply
    129,350.20x = 178,490.64 × 72,760.36
  4. Step 4: Simplify right side
    129,350.20x = 12,987,043,223.03
  5. Step 5: Solve for x
    x = 12,987,043,223.03/129,350.20
  6. Step 6: Final answer
    x = 100,402.19

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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.