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Finding the Fourth Proportional to 163.76, 245.75 and 67.57

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Solution

The fourth proportional to 163.76, 245.75 and 67.57 is: 101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.76 : 245.75 = 67.57 : x
  2. Step 2: Convert to fraction form
    163.76/245.75 = 67.57/x
  3. Step 3: Cross multiply
    163.76x = 245.75 × 67.57
  4. Step 4: Simplify right side
    163.76x = 16,605.55
  5. Step 5: Solve for x
    x = 16,605.55/163.76
  6. Step 6: Final answer
    x = 101.40

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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.