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Finding the Fourth Proportional to 117.38, 174.57 and 115.07

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Solution

The fourth proportional to 117.38, 174.57 and 115.07 is: 171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.38 : 174.57 = 115.07 : x
  2. Step 2: Convert to fraction form
    117.38/174.57 = 115.07/x
  3. Step 3: Cross multiply
    117.38x = 174.57 × 115.07
  4. Step 4: Simplify right side
    117.38x = 20,087.19
  5. Step 5: Solve for x
    x = 20,087.19/117.38
  6. Step 6: Final answer
    x = 171.14

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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.