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Finding the Fourth Proportional to 117.17, 176.67 and 103.80

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Solution

The fourth proportional to 117.17, 176.67 and 103.80 is: 156.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.17 : 176.67 = 103.80 : x
  2. Step 2: Convert to fraction form
    117.17/176.67 = 103.80/x
  3. Step 3: Cross multiply
    117.17x = 176.67 × 103.80
  4. Step 4: Simplify right side
    117.17x = 18,338.35
  5. Step 5: Solve for x
    x = 18,338.35/117.17
  6. Step 6: Final answer
    x = 156.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.