Home / 156,540.20-234,939.90-72,429.80

Finding the Fourth Proportional to 156,540.20, 234,939.90 and 72,429.80

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Solution

The fourth proportional to 156,540.20, 234,939.90 and 72,429.80 is: 108,704.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,540.20 : 234,939.90 = 72,429.80 : x
  2. Step 2: Convert to fraction form
    156,540.20/234,939.90 = 72,429.80/x
  3. Step 3: Cross multiply
    156,540.20x = 234,939.90 × 72,429.80
  4. Step 4: Simplify right side
    156,540.20x = 17,016,649,969.02
  5. Step 5: Solve for x
    x = 17,016,649,969.02/156,540.20
  6. Step 6: Final answer
    x = 108,704.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.