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Finding the Fourth Proportional to 108.36, 149.20 and 96.20

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Solution

The fourth proportional to 108.36, 149.20 and 96.20 is: 132.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.36 : 149.20 = 96.20 : x
  2. Step 2: Convert to fraction form
    108.36/149.20 = 96.20/x
  3. Step 3: Cross multiply
    108.36x = 149.20 × 96.20
  4. Step 4: Simplify right side
    108.36x = 14,353.04
  5. Step 5: Solve for x
    x = 14,353.04/108.36
  6. Step 6: Final answer
    x = 132.46

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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.