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Finding the Fourth Proportional to 66,921.71, 100,248.73 and 40,252.97

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Solution

The fourth proportional to 66,921.71, 100,248.73 and 40,252.97 is: 60,298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,921.71 : 100,248.73 = 40,252.97 : x
  2. Step 2: Convert to fraction form
    66,921.71/100,248.73 = 40,252.97/x
  3. Step 3: Cross multiply
    66,921.71x = 100,248.73 × 40,252.97
  4. Step 4: Simplify right side
    66,921.71x = 4,035,309,121.23
  5. Step 5: Solve for x
    x = 4,035,309,121.23/66,921.71
  6. Step 6: Final answer
    x = 60,298.95

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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.