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Finding the Fourth Proportional to 117.66, 176.49 and 75.18

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Solution

The fourth proportional to 117.66, 176.49 and 75.18 is: 112.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.66 : 176.49 = 75.18 : x
  2. Step 2: Convert to fraction form
    117.66/176.49 = 75.18/x
  3. Step 3: Cross multiply
    117.66x = 176.49 × 75.18
  4. Step 4: Simplify right side
    117.66x = 13,268.52
  5. Step 5: Solve for x
    x = 13,268.52/117.66
  6. Step 6: Final answer
    x = 112.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.