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Finding the Fourth Proportional to 159.27, 219.75 and 89.30

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Solution

The fourth proportional to 159.27, 219.75 and 89.30 is: 123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.27 : 219.75 = 89.30 : x
  2. Step 2: Convert to fraction form
    159.27/219.75 = 89.30/x
  3. Step 3: Cross multiply
    159.27x = 219.75 × 89.30
  4. Step 4: Simplify right side
    159.27x = 19,623.89
  5. Step 5: Solve for x
    x = 19,623.89/159.27
  6. Step 6: Final answer
    x = 123.21

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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.