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Finding the Fourth Proportional to 66,539.70, 99,793.08 and 39,869.10

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Solution

The fourth proportional to 66,539.70, 99,793.08 and 39,869.10 is: 59,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,539.70 : 99,793.08 = 39,869.10 : x
  2. Step 2: Convert to fraction form
    66,539.70/99,793.08 = 39,869.10/x
  3. Step 3: Cross multiply
    66,539.70x = 99,793.08 × 39,869.10
  4. Step 4: Simplify right side
    66,539.70x = 3,978,660,285.83
  5. Step 5: Solve for x
    x = 3,978,660,285.83/66,539.70
  6. Step 6: Final answer
    x = 59,793.78

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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.