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Finding the Fourth Proportional to 118.72, 176.76 and 118.36

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Solution

The fourth proportional to 118.72, 176.76 and 118.36 is: 176.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.72 : 176.76 = 118.36 : x
  2. Step 2: Convert to fraction form
    118.72/176.76 = 118.36/x
  3. Step 3: Cross multiply
    118.72x = 176.76 × 118.36
  4. Step 4: Simplify right side
    118.72x = 20,921.31
  5. Step 5: Solve for x
    x = 20,921.31/118.72
  6. Step 6: Final answer
    x = 176.22

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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.