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Finding the Fourth Proportional to 157.68, 217.64 and 101.75

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Solution

The fourth proportional to 157.68, 217.64 and 101.75 is: 140.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.68 : 217.64 = 101.75 : x
  2. Step 2: Convert to fraction form
    157.68/217.64 = 101.75/x
  3. Step 3: Cross multiply
    157.68x = 217.64 × 101.75
  4. Step 4: Simplify right side
    157.68x = 22,144.87
  5. Step 5: Solve for x
    x = 22,144.87/157.68
  6. Step 6: Final answer
    x = 140.44

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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.