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Finding the Fourth Proportional to 122,281.97, 168,745.61 and 74,517.89

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Solution

The fourth proportional to 122,281.97, 168,745.61 and 74,517.89 is: 102,832.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,281.97 : 168,745.61 = 74,517.89 : x
  2. Step 2: Convert to fraction form
    122,281.97/168,745.61 = 74,517.89/x
  3. Step 3: Cross multiply
    122,281.97x = 168,745.61 × 74,517.89
  4. Step 4: Simplify right side
    122,281.97x = 12,574,565,587.65
  5. Step 5: Solve for x
    x = 12,574,565,587.65/122,281.97
  6. Step 6: Final answer
    x = 102,832.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.