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Finding the Fourth Proportional to 272,378.37, 408,542.49 and 72,691.59

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Solution

The fourth proportional to 272,378.37, 408,542.49 and 72,691.59 is: 109,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,378.37 : 408,542.49 = 72,691.59 : x
  2. Step 2: Convert to fraction form
    272,378.37/408,542.49 = 72,691.59/x
  3. Step 3: Cross multiply
    272,378.37x = 408,542.49 × 72,691.59
  4. Step 4: Simplify right side
    272,378.37x = 29,697,603,180.66
  5. Step 5: Solve for x
    x = 29,697,603,180.66/272,378.37
  6. Step 6: Final answer
    x = 109,030.70

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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.