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Finding the Fourth Proportional to 101.16, 151.56 and 80.51

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Solution

The fourth proportional to 101.16, 151.56 and 80.51 is: 120.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.16 : 151.56 = 80.51 : x
  2. Step 2: Convert to fraction form
    101.16/151.56 = 80.51/x
  3. Step 3: Cross multiply
    101.16x = 151.56 × 80.51
  4. Step 4: Simplify right side
    101.16x = 12,201.34
  5. Step 5: Solve for x
    x = 12,201.34/101.16
  6. Step 6: Final answer
    x = 120.61

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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.