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Finding the Fourth Proportional to 68,397.67, 102,612.30 and 21,650.55

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Solution

The fourth proportional to 68,397.67, 102,612.30 and 21,650.55 is: 32,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,397.67 : 102,612.30 = 21,650.55 : x
  2. Step 2: Convert to fraction form
    68,397.67/102,612.30 = 21,650.55/x
  3. Step 3: Cross multiply
    68,397.67x = 102,612.30 × 21,650.55
  4. Step 4: Simplify right side
    68,397.67x = 2,221,612,731.77
  5. Step 5: Solve for x
    x = 2,221,612,731.77/68,397.67
  6. Step 6: Final answer
    x = 32,480.82

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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.