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Finding the Fourth Proportional to 117.24, 161.41 and 101.90

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Solution

The fourth proportional to 117.24, 161.41 and 101.90 is: 140.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.24 : 161.41 = 101.90 : x
  2. Step 2: Convert to fraction form
    117.24/161.41 = 101.90/x
  3. Step 3: Cross multiply
    117.24x = 161.41 × 101.90
  4. Step 4: Simplify right side
    117.24x = 16,447.68
  5. Step 5: Solve for x
    x = 16,447.68/117.24
  6. Step 6: Final answer
    x = 140.29

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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.