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Finding the Fourth Proportional to 147.68, 221.73 and 98.97

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Solution

The fourth proportional to 147.68, 221.73 and 98.97 is: 148.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.68 : 221.73 = 98.97 : x
  2. Step 2: Convert to fraction form
    147.68/221.73 = 98.97/x
  3. Step 3: Cross multiply
    147.68x = 221.73 × 98.97
  4. Step 4: Simplify right side
    147.68x = 21,943.42
  5. Step 5: Solve for x
    x = 21,943.42/147.68
  6. Step 6: Final answer
    x = 148.59

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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.