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Finding the Fourth Proportional to 169.15, 253.65 and 53.55

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Solution

The fourth proportional to 169.15, 253.65 and 53.55 is: 80.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.15 : 253.65 = 53.55 : x
  2. Step 2: Convert to fraction form
    169.15/253.65 = 53.55/x
  3. Step 3: Cross multiply
    169.15x = 253.65 × 53.55
  4. Step 4: Simplify right side
    169.15x = 13,582.96
  5. Step 5: Solve for x
    x = 13,582.96/169.15
  6. Step 6: Final answer
    x = 80.30

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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.