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Finding the Fourth Proportional to 153.92, 212.17 and 101.37

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Solution

The fourth proportional to 153.92, 212.17 and 101.37 is: 139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.92 : 212.17 = 101.37 : x
  2. Step 2: Convert to fraction form
    153.92/212.17 = 101.37/x
  3. Step 3: Cross multiply
    153.92x = 212.17 × 101.37
  4. Step 4: Simplify right side
    153.92x = 21,507.67
  5. Step 5: Solve for x
    x = 21,507.67/153.92
  6. Step 6: Final answer
    x = 139.73

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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.