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Finding the Fourth Proportional to 121,395.78, 167,612.49 and 101,304.54

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Solution

The fourth proportional to 121,395.78, 167,612.49 and 101,304.54 is: 139,872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,395.78 : 167,612.49 = 101,304.54 : x
  2. Step 2: Convert to fraction form
    121,395.78/167,612.49 = 101,304.54/x
  3. Step 3: Cross multiply
    121,395.78x = 167,612.49 × 101,304.54
  4. Step 4: Simplify right side
    121,395.78x = 16,979,906,197.70
  5. Step 5: Solve for x
    x = 16,979,906,197.70/121,395.78
  6. Step 6: Final answer
    x = 139,872.29

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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.