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Finding the Fourth Proportional to 115.34, 171.82 and 112.16

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Solution

The fourth proportional to 115.34, 171.82 and 112.16 is: 167.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.34 : 171.82 = 112.16 : x
  2. Step 2: Convert to fraction form
    115.34/171.82 = 112.16/x
  3. Step 3: Cross multiply
    115.34x = 171.82 × 112.16
  4. Step 4: Simplify right side
    115.34x = 19,271.33
  5. Step 5: Solve for x
    x = 19,271.33/115.34
  6. Step 6: Final answer
    x = 167.08

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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.