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Finding the Fourth Proportional to 118.16, 176.19 and 103.77

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Solution

The fourth proportional to 118.16, 176.19 and 103.77 is: 154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.16 : 176.19 = 103.77 : x
  2. Step 2: Convert to fraction form
    118.16/176.19 = 103.77/x
  3. Step 3: Cross multiply
    118.16x = 176.19 × 103.77
  4. Step 4: Simplify right side
    118.16x = 18,283.24
  5. Step 5: Solve for x
    x = 18,283.24/118.16
  6. Step 6: Final answer
    x = 154.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.