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Finding the Fourth Proportional to 101.96, 152.20 and 89.81

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Solution

The fourth proportional to 101.96, 152.20 and 89.81 is: 134.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.96 : 152.20 = 89.81 : x
  2. Step 2: Convert to fraction form
    101.96/152.20 = 89.81/x
  3. Step 3: Cross multiply
    101.96x = 152.20 × 89.81
  4. Step 4: Simplify right side
    101.96x = 13,669.24
  5. Step 5: Solve for x
    x = 13,669.24/101.96
  6. Step 6: Final answer
    x = 134.06

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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.