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Finding the Fourth Proportional to 78,686.57, 118,064.73 and 41,237.73

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Solution

The fourth proportional to 78,686.57, 118,064.73 and 41,237.73 is: 61,874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.57 : 118,064.73 = 41,237.73 : x
  2. Step 2: Convert to fraction form
    78,686.57/118,064.73 = 41,237.73/x
  3. Step 3: Cross multiply
    78,686.57x = 118,064.73 × 41,237.73
  4. Step 4: Simplify right side
    78,686.57x = 4,868,721,458.26
  5. Step 5: Solve for x
    x = 4,868,721,458.26/78,686.57
  6. Step 6: Final answer
    x = 61,874.88

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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.