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Finding the Fourth Proportional to 159.36, 220.08 and 144.72

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Solution

The fourth proportional to 159.36, 220.08 and 144.72 is: 199.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.36 : 220.08 = 144.72 : x
  2. Step 2: Convert to fraction form
    159.36/220.08 = 144.72/x
  3. Step 3: Cross multiply
    159.36x = 220.08 × 144.72
  4. Step 4: Simplify right side
    159.36x = 31,849.98
  5. Step 5: Solve for x
    x = 31,849.98/159.36
  6. Step 6: Final answer
    x = 199.86

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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.