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Finding the Fourth Proportional to 60,800, 91,125.12 and 43,174.40

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Solution

The fourth proportional to 60,800, 91,125.12 and 43,174.40 is: 64,708.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,800 : 91,125.12 = 43,174.40 : x
  2. Step 2: Convert to fraction form
    60,800/91,125.12 = 43,174.40/x
  3. Step 3: Cross multiply
    60,800x = 91,125.12 × 43,174.40
  4. Step 4: Simplify right side
    60,800x = 3,934,272,380.93
  5. Step 5: Solve for x
    x = 3,934,272,380.93/60,800
  6. Step 6: Final answer
    x = 64,708.43

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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.