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Finding the Fourth Proportional to 60,761.80, 91,142.70 and 52,451.20

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Solution

The fourth proportional to 60,761.80, 91,142.70 and 52,451.20 is: 78,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,761.80 : 91,142.70 = 52,451.20 : x
  2. Step 2: Convert to fraction form
    60,761.80/91,142.70 = 52,451.20/x
  3. Step 3: Cross multiply
    60,761.80x = 91,142.70 × 52,451.20
  4. Step 4: Simplify right side
    60,761.80x = 4,780,543,986.24
  5. Step 5: Solve for x
    x = 4,780,543,986.24/60,761.80
  6. Step 6: Final answer
    x = 78,676.80

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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.