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Finding the Fourth Proportional to 101.16, 151.14 and 83.76

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Solution

The fourth proportional to 101.16, 151.14 and 83.76 is: 125.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.16 : 151.14 = 83.76 : x
  2. Step 2: Convert to fraction form
    101.16/151.14 = 83.76/x
  3. Step 3: Cross multiply
    101.16x = 151.14 × 83.76
  4. Step 4: Simplify right side
    101.16x = 12,659.49
  5. Step 5: Solve for x
    x = 12,659.49/101.16
  6. Step 6: Final answer
    x = 125.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.