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Finding the Fourth Proportional to 66,228.30, 99,115.65 and 39,951.90

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Solution

The fourth proportional to 66,228.30, 99,115.65 and 39,951.90 is: 59,791.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,228.30 : 99,115.65 = 39,951.90 : x
  2. Step 2: Convert to fraction form
    66,228.30/99,115.65 = 39,951.90/x
  3. Step 3: Cross multiply
    66,228.30x = 99,115.65 × 39,951.90
  4. Step 4: Simplify right side
    66,228.30x = 3,959,858,537.24
  5. Step 5: Solve for x
    x = 3,959,858,537.24/66,228.30
  6. Step 6: Final answer
    x = 59,791.03

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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.