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Finding the Fourth Proportional to 72,539.06, 108,730.10 and 30,442

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Solution

The fourth proportional to 72,539.06, 108,730.10 and 30,442 is: 45,630.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539.06 : 108,730.10 = 30,442 : x
  2. Step 2: Convert to fraction form
    72,539.06/108,730.10 = 30,442/x
  3. Step 3: Cross multiply
    72,539.06x = 108,730.10 × 30,442
  4. Step 4: Simplify right side
    72,539.06x = 3,309,961,704.20
  5. Step 5: Solve for x
    x = 3,309,961,704.20/72,539.06
  6. Step 6: Final answer
    x = 45,630.06

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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.