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Finding the Fourth Proportional to 68,253.28, 102,380.18 and 20,868.18

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Solution

The fourth proportional to 68,253.28, 102,380.18 and 20,868.18 is: 31,302.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,253.28 : 102,380.18 = 20,868.18 : x
  2. Step 2: Convert to fraction form
    68,253.28/102,380.18 = 20,868.18/x
  3. Step 3: Cross multiply
    68,253.28x = 102,380.18 × 20,868.18
  4. Step 4: Simplify right side
    68,253.28x = 2,136,488,024.67
  5. Step 5: Solve for x
    x = 2,136,488,024.67/68,253.28
  6. Step 6: Final answer
    x = 31,302.35

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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.