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Finding the Fourth Proportional to 147.71, 221.04 and 109.09

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Solution

The fourth proportional to 147.71, 221.04 and 109.09 is: 163.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.71 : 221.04 = 109.09 : x
  2. Step 2: Convert to fraction form
    147.71/221.04 = 109.09/x
  3. Step 3: Cross multiply
    147.71x = 221.04 × 109.09
  4. Step 4: Simplify right side
    147.71x = 24,113.25
  5. Step 5: Solve for x
    x = 24,113.25/147.71
  6. Step 6: Final answer
    x = 163.25

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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.