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Finding the Fourth Proportional to 121,166.07, 167,205.43 and 67,449.90

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Solution

The fourth proportional to 121,166.07, 167,205.43 and 67,449.90 is: 93,078.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,166.07 : 167,205.43 = 67,449.90 : x
  2. Step 2: Convert to fraction form
    121,166.07/167,205.43 = 67,449.90/x
  3. Step 3: Cross multiply
    121,166.07x = 167,205.43 × 67,449.90
  4. Step 4: Simplify right side
    121,166.07x = 11,277,989,532.96
  5. Step 5: Solve for x
    x = 11,277,989,532.96/121,166.07
  6. Step 6: Final answer
    x = 93,078.78

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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.