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Finding the Fourth Proportional to 68,687.62, 103,046.23 and 21,301.76

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Solution

The fourth proportional to 68,687.62, 103,046.23 and 21,301.76 is: 31,957.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,687.62 : 103,046.23 = 21,301.76 : x
  2. Step 2: Convert to fraction form
    68,687.62/103,046.23 = 21,301.76/x
  3. Step 3: Cross multiply
    68,687.62x = 103,046.23 × 21,301.76
  4. Step 4: Simplify right side
    68,687.62x = 2,195,065,438.62
  5. Step 5: Solve for x
    x = 2,195,065,438.62/68,687.62
  6. Step 6: Final answer
    x = 31,957.22

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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.