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Finding the Fourth Proportional to 68,614.70, 102,720.45 and 51,161.90

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Solution

The fourth proportional to 68,614.70, 102,720.45 and 51,161.90 is: 76,592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,614.70 : 102,720.45 = 51,161.90 : x
  2. Step 2: Convert to fraction form
    68,614.70/102,720.45 = 51,161.90/x
  3. Step 3: Cross multiply
    68,614.70x = 102,720.45 × 51,161.90
  4. Step 4: Simplify right side
    68,614.70x = 5,255,373,390.86
  5. Step 5: Solve for x
    x = 5,255,373,390.86/68,614.70
  6. Step 6: Final answer
    x = 76,592.53

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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.