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Finding the Fourth Proportional to 72,493.20, 100,121.67 and 49,901.49

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Solution

The fourth proportional to 72,493.20, 100,121.67 and 49,901.49 is: 68,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,493.20 : 100,121.67 = 49,901.49 : x
  2. Step 2: Convert to fraction form
    72,493.20/100,121.67 = 49,901.49/x
  3. Step 3: Cross multiply
    72,493.20x = 100,121.67 × 49,901.49
  4. Step 4: Simplify right side
    72,493.20x = 4,996,220,514.29
  5. Step 5: Solve for x
    x = 4,996,220,514.29/72,493.20
  6. Step 6: Final answer
    x = 68,919.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.