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Finding the Fourth Proportional to 121,137.55, 167,168.13 and 67,422.58

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Solution

The fourth proportional to 121,137.55, 167,168.13 and 67,422.58 is: 93,042.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,137.55 : 167,168.13 = 67,422.58 : x
  2. Step 2: Convert to fraction form
    121,137.55/167,168.13 = 67,422.58/x
  3. Step 3: Cross multiply
    121,137.55x = 167,168.13 × 67,422.58
  4. Step 4: Simplify right side
    121,137.55x = 11,270,906,618.38
  5. Step 5: Solve for x
    x = 11,270,906,618.38/121,137.55
  6. Step 6: Final answer
    x = 93,042.22

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1.5x scale

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.