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Finding the Fourth Proportional to 121,358.25, 167,480.13 and 67,643.64

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Solution

The fourth proportional to 121,358.25, 167,480.13 and 67,643.64 is: 93,351.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,358.25 : 167,480.13 = 67,643.64 : x
  2. Step 2: Convert to fraction form
    121,358.25/167,480.13 = 67,643.64/x
  3. Step 3: Cross multiply
    121,358.25x = 167,480.13 × 67,643.64
  4. Step 4: Simplify right side
    121,358.25x = 11,328,965,620.87
  5. Step 5: Solve for x
    x = 11,328,965,620.87/121,358.25
  6. Step 6: Final answer
    x = 93,351.43

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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.