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Finding the Fourth Proportional to 72,375.28, 108,539.88 and 30,255.28

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Solution

The fourth proportional to 72,375.28, 108,539.88 and 30,255.28 is: 45,373.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.28 : 108,539.88 = 30,255.28 : x
  2. Step 2: Convert to fraction form
    72,375.28/108,539.88 = 30,255.28/x
  3. Step 3: Cross multiply
    72,375.28x = 108,539.88 × 30,255.28
  4. Step 4: Simplify right side
    72,375.28x = 3,283,904,460.57
  5. Step 5: Solve for x
    x = 3,283,904,460.57/72,375.28
  6. Step 6: Final answer
    x = 45,373.29

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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.