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Finding the Fourth Proportional to 60,490.20, 90,735.30 and 54,147.90

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Solution

The fourth proportional to 60,490.20, 90,735.30 and 54,147.90 is: 81,221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,490.20 : 90,735.30 = 54,147.90 : x
  2. Step 2: Convert to fraction form
    60,490.20/90,735.30 = 54,147.90/x
  3. Step 3: Cross multiply
    60,490.20x = 90,735.30 × 54,147.90
  4. Step 4: Simplify right side
    60,490.20x = 4,913,125,950.87
  5. Step 5: Solve for x
    x = 4,913,125,950.87/60,490.20
  6. Step 6: Final answer
    x = 81,221.85

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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.