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Finding the Fourth Proportional to 66,438.67, 99,658.00 and 19,691.54

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Solution

The fourth proportional to 66,438.67, 99,658.00 and 19,691.54 is: 29,537.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.67 : 99,658.00 = 19,691.54 : x
  2. Step 2: Convert to fraction form
    66,438.67/99,658.00 = 19,691.54/x
  3. Step 3: Cross multiply
    66,438.67x = 99,658.00 × 19,691.54
  4. Step 4: Simplify right side
    66,438.67x = 1,962,419,827.64
  5. Step 5: Solve for x
    x = 1,962,419,827.64/66,438.67
  6. Step 6: Final answer
    x = 29,537.31

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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.