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Finding the Fourth Proportional to 118.48, 176.78 and 117.80

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Solution

The fourth proportional to 118.48, 176.78 and 117.80 is: 175.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.48 : 176.78 = 117.80 : x
  2. Step 2: Convert to fraction form
    118.48/176.78 = 117.80/x
  3. Step 3: Cross multiply
    118.48x = 176.78 × 117.80
  4. Step 4: Simplify right side
    118.48x = 20,824.68
  5. Step 5: Solve for x
    x = 20,824.68/118.48
  6. Step 6: Final answer
    x = 175.77

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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.