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Finding the Fourth Proportional to 121,748.67, 168,016.88 and 68,035.95

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Solution

The fourth proportional to 121,748.67, 168,016.88 and 68,035.95 is: 93,891.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,748.67 : 168,016.88 = 68,035.95 : x
  2. Step 2: Convert to fraction form
    121,748.67/168,016.88 = 68,035.95/x
  3. Step 3: Cross multiply
    121,748.67x = 168,016.88 × 68,035.95
  4. Step 4: Simplify right side
    121,748.67x = 11,431,188,216.93
  5. Step 5: Solve for x
    x = 11,431,188,216.93/121,748.67
  6. Step 6: Final answer
    x = 93,891.69

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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.