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Finding the Fourth Proportional to 159.00, 219.21 and 109.89

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Solution

The fourth proportional to 159.00, 219.21 and 109.89 is: 151.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.00 : 219.21 = 109.89 : x
  2. Step 2: Convert to fraction form
    159.00/219.21 = 109.89/x
  3. Step 3: Cross multiply
    159.00x = 219.21 × 109.89
  4. Step 4: Simplify right side
    159.00x = 24,088.57
  5. Step 5: Solve for x
    x = 24,088.57/159.00
  6. Step 6: Final answer
    x = 151.50

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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.