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Finding the Fourth Proportional to 99,761.80, 149,568.30 and 60,310.60

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Solution

The fourth proportional to 99,761.80, 149,568.30 and 60,310.60 is: 90,420.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,761.80 : 149,568.30 = 60,310.60 : x
  2. Step 2: Convert to fraction form
    99,761.80/149,568.30 = 60,310.60/x
  3. Step 3: Cross multiply
    99,761.80x = 149,568.30 × 60,310.60
  4. Step 4: Simplify right side
    99,761.80x = 9,020,553,913.98
  5. Step 5: Solve for x
    x = 9,020,553,913.98/99,761.80
  6. Step 6: Final answer
    x = 90,420.92

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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.