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Finding the Fourth Proportional to 68,532.72, 102,777.20 and 21,774.66

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Solution

The fourth proportional to 68,532.72, 102,777.20 and 21,774.66 is: 32,655.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,532.72 : 102,777.20 = 21,774.66 : x
  2. Step 2: Convert to fraction form
    68,532.72/102,777.20 = 21,774.66/x
  3. Step 3: Cross multiply
    68,532.72x = 102,777.20 × 21,774.66
  4. Step 4: Simplify right side
    68,532.72x = 2,237,938,585.75
  5. Step 5: Solve for x
    x = 2,237,938,585.75/68,532.72
  6. Step 6: Final answer
    x = 32,655.04

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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.