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Finding the Fourth Proportional to 169.11, 253.68 and 53.56

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Solution

The fourth proportional to 169.11, 253.68 and 53.56 is: 80.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.11 : 253.68 = 53.56 : x
  2. Step 2: Convert to fraction form
    169.11/253.68 = 53.56/x
  3. Step 3: Cross multiply
    169.11x = 253.68 × 53.56
  4. Step 4: Simplify right side
    169.11x = 13,587.10
  5. Step 5: Solve for x
    x = 13,587.10/169.11
  6. Step 6: Final answer
    x = 80.34

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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.