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Finding the Fourth Proportional to 121,456.67, 167,610.45 and 67,740.30

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Solution

The fourth proportional to 121,456.67, 167,610.45 and 67,740.30 is: 93,481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,456.67 : 167,610.45 = 67,740.30 : x
  2. Step 2: Convert to fraction form
    121,456.67/167,610.45 = 67,740.30/x
  3. Step 3: Cross multiply
    121,456.67x = 167,610.45 × 67,740.30
  4. Step 4: Simplify right side
    121,456.67x = 11,353,982,166.14
  5. Step 5: Solve for x
    x = 11,353,982,166.14/121,456.67
  6. Step 6: Final answer
    x = 93,481.75

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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.