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Finding the Fourth Proportional to 53.42, 80.08 and 45.25

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Solution

The fourth proportional to 53.42, 80.08 and 45.25 is: 67.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.42 : 80.08 = 45.25 : x
  2. Step 2: Convert to fraction form
    53.42/80.08 = 45.25/x
  3. Step 3: Cross multiply
    53.42x = 80.08 × 45.25
  4. Step 4: Simplify right side
    53.42x = 3,623.31
  5. Step 5: Solve for x
    x = 3,623.31/53.42
  6. Step 6: Final answer
    x = 67.83

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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.