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Finding the Fourth Proportional to 167.07, 230.55 and 100.72

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Solution

The fourth proportional to 167.07, 230.55 and 100.72 is: 138.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.07 : 230.55 = 100.72 : x
  2. Step 2: Convert to fraction form
    167.07/230.55 = 100.72/x
  3. Step 3: Cross multiply
    167.07x = 230.55 × 100.72
  4. Step 4: Simplify right side
    167.07x = 23,220.42
  5. Step 5: Solve for x
    x = 23,220.42/167.07
  6. Step 6: Final answer
    x = 138.99

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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.