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Finding the Fourth Proportional to 149.40, 206.10 and 112.44

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Solution

The fourth proportional to 149.40, 206.10 and 112.44 is: 155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.40 : 206.10 = 112.44 : x
  2. Step 2: Convert to fraction form
    149.40/206.10 = 112.44/x
  3. Step 3: Cross multiply
    149.40x = 206.10 × 112.44
  4. Step 4: Simplify right side
    149.40x = 23,173.88
  5. Step 5: Solve for x
    x = 23,173.88/149.40
  6. Step 6: Final answer
    x = 155.11

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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.