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Finding the Fourth Proportional to 66,287.38, 99,235.69 and 43,756.50

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Solution

The fourth proportional to 66,287.38, 99,235.69 and 43,756.50 is: 65,505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.38 : 99,235.69 = 43,756.50 : x
  2. Step 2: Convert to fraction form
    66,287.38/99,235.69 = 43,756.50/x
  3. Step 3: Cross multiply
    66,287.38x = 99,235.69 × 43,756.50
  4. Step 4: Simplify right side
    66,287.38x = 4,342,206,469.49
  5. Step 5: Solve for x
    x = 4,342,206,469.49/66,287.38
  6. Step 6: Final answer
    x = 65,505.78

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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.