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Finding the Fourth Proportional to 167.68, 231.47 and 112.40

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Solution

The fourth proportional to 167.68, 231.47 and 112.40 is: 155.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.68 : 231.47 = 112.40 : x
  2. Step 2: Convert to fraction form
    167.68/231.47 = 112.40/x
  3. Step 3: Cross multiply
    167.68x = 231.47 × 112.40
  4. Step 4: Simplify right side
    167.68x = 26,017.23
  5. Step 5: Solve for x
    x = 26,017.23/167.68
  6. Step 6: Final answer
    x = 155.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.