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Finding the Fourth Proportional to 159.96, 220.80 and 107.52

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Solution

The fourth proportional to 159.96, 220.80 and 107.52 is: 148.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.96 : 220.80 = 107.52 : x
  2. Step 2: Convert to fraction form
    159.96/220.80 = 107.52/x
  3. Step 3: Cross multiply
    159.96x = 220.80 × 107.52
  4. Step 4: Simplify right side
    159.96x = 23,740.42
  5. Step 5: Solve for x
    x = 23,740.42/159.96
  6. Step 6: Final answer
    x = 148.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.