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Finding the Fourth Proportional to 108.06, 149.40 and 88.53

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Solution

The fourth proportional to 108.06, 149.40 and 88.53 is: 122.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.06 : 149.40 = 88.53 : x
  2. Step 2: Convert to fraction form
    108.06/149.40 = 88.53/x
  3. Step 3: Cross multiply
    108.06x = 149.40 × 88.53
  4. Step 4: Simplify right side
    108.06x = 13,226.38
  5. Step 5: Solve for x
    x = 13,226.38/108.06
  6. Step 6: Final answer
    x = 122.40

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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.