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Finding the Fourth Proportional to 118.69, 176.64 and 117.55

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Solution

The fourth proportional to 118.69, 176.64 and 117.55 is: 174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.69 : 176.64 = 117.55 : x
  2. Step 2: Convert to fraction form
    118.69/176.64 = 117.55/x
  3. Step 3: Cross multiply
    118.69x = 176.64 × 117.55
  4. Step 4: Simplify right side
    118.69x = 20,763.59
  5. Step 5: Solve for x
    x = 20,763.59/118.69
  6. Step 6: Final answer
    x = 174.95

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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.