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Finding the Fourth Proportional to 99.28, 149.01 and 53.67

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Solution

The fourth proportional to 99.28, 149.01 and 53.67 is: 80.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.28 : 149.01 = 53.67 : x
  2. Step 2: Convert to fraction form
    99.28/149.01 = 53.67/x
  3. Step 3: Cross multiply
    99.28x = 149.01 × 53.67
  4. Step 4: Simplify right side
    99.28x = 7,997.10
  5. Step 5: Solve for x
    x = 7,997.10/99.28
  6. Step 6: Final answer
    x = 80.56

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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.