Home / 72,130.20-108,195.30-40,507.80

Finding the Fourth Proportional to 72,130.20, 108,195.30 and 40,507.80

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Solution

The fourth proportional to 72,130.20, 108,195.30 and 40,507.80 is: 60,761.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.20 : 108,195.30 = 40,507.80 : x
  2. Step 2: Convert to fraction form
    72,130.20/108,195.30 = 40,507.80/x
  3. Step 3: Cross multiply
    72,130.20x = 108,195.30 × 40,507.80
  4. Step 4: Simplify right side
    72,130.20x = 4,382,753,573.34
  5. Step 5: Solve for x
    x = 4,382,753,573.34/72,130.20
  6. Step 6: Final answer
    x = 60,761.70

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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.