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Finding the Fourth Proportional to 149.76, 223.74 and 109.20

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Solution

The fourth proportional to 149.76, 223.74 and 109.20 is: 163.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.76 : 223.74 = 109.20 : x
  2. Step 2: Convert to fraction form
    149.76/223.74 = 109.20/x
  3. Step 3: Cross multiply
    149.76x = 223.74 × 109.20
  4. Step 4: Simplify right side
    149.76x = 24,432.41
  5. Step 5: Solve for x
    x = 24,432.41/149.76
  6. Step 6: Final answer
    x = 163.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.