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Finding the Fourth Proportional to 45,242.55, 67,836.49 and 20,277.95

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Solution

The fourth proportional to 45,242.55, 67,836.49 and 20,277.95 is: 30,404.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,242.55 : 67,836.49 = 20,277.95 : x
  2. Step 2: Convert to fraction form
    45,242.55/67,836.49 = 20,277.95/x
  3. Step 3: Cross multiply
    45,242.55x = 67,836.49 × 20,277.95
  4. Step 4: Simplify right side
    45,242.55x = 1,375,584,562.52
  5. Step 5: Solve for x
    x = 1,375,584,562.52/45,242.55
  6. Step 6: Final answer
    x = 30,404.66

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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.