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Finding the Fourth Proportional to 112.40, 168.14 and 101.75

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Solution

The fourth proportional to 112.40, 168.14 and 101.75 is: 152.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.40 : 168.14 = 101.75 : x
  2. Step 2: Convert to fraction form
    112.40/168.14 = 101.75/x
  3. Step 3: Cross multiply
    112.40x = 168.14 × 101.75
  4. Step 4: Simplify right side
    112.40x = 17,108.25
  5. Step 5: Solve for x
    x = 17,108.25/112.40
  6. Step 6: Final answer
    x = 152.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.