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Finding the Fourth Proportional to 108.84, 149.24 and 107.40

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Solution

The fourth proportional to 108.84, 149.24 and 107.40 is: 147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.84 : 149.24 = 107.40 : x
  2. Step 2: Convert to fraction form
    108.84/149.24 = 107.40/x
  3. Step 3: Cross multiply
    108.84x = 149.24 × 107.40
  4. Step 4: Simplify right side
    108.84x = 16,028.38
  5. Step 5: Solve for x
    x = 16,028.38/108.84
  6. Step 6: Final answer
    x = 147.27

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.