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Finding the Fourth Proportional to 108.77, 150.05 and 82.53

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Solution

The fourth proportional to 108.77, 150.05 and 82.53 is: 113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.77 : 150.05 = 82.53 : x
  2. Step 2: Convert to fraction form
    108.77/150.05 = 82.53/x
  3. Step 3: Cross multiply
    108.77x = 150.05 × 82.53
  4. Step 4: Simplify right side
    108.77x = 12,383.21
  5. Step 5: Solve for x
    x = 12,383.21/108.77
  6. Step 6: Final answer
    x = 113.85

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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.