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Finding the Fourth Proportional to 45,319.62, 67,989.15 and 19,009.20

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Solution

The fourth proportional to 45,319.62, 67,989.15 and 19,009.20 is: 28,517.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,319.62 : 67,989.15 = 19,009.20 : x
  2. Step 2: Convert to fraction form
    45,319.62/67,989.15 = 19,009.20/x
  3. Step 3: Cross multiply
    45,319.62x = 67,989.15 × 19,009.20
  4. Step 4: Simplify right side
    45,319.62x = 1,292,419,350.18
  5. Step 5: Solve for x
    x = 1,292,419,350.18/45,319.62
  6. Step 6: Final answer
    x = 28,517.88

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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.