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Finding the Fourth Proportional to 121,354.11, 167,469.44 and 67,642.53

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Solution

The fourth proportional to 121,354.11, 167,469.44 and 67,642.53 is: 93,347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,354.11 : 167,469.44 = 67,642.53 : x
  2. Step 2: Convert to fraction form
    121,354.11/167,469.44 = 67,642.53/x
  3. Step 3: Cross multiply
    121,354.11x = 167,469.44 × 67,642.53
  4. Step 4: Simplify right side
    121,354.11x = 11,328,055,781.94
  5. Step 5: Solve for x
    x = 11,328,055,781.94/121,354.11
  6. Step 6: Final answer
    x = 93,347.12

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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.