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Finding the Fourth Proportional to 82.25, 123.42 and 53.34

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Solution

The fourth proportional to 82.25, 123.42 and 53.34 is: 80.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.25 : 123.42 = 53.34 : x
  2. Step 2: Convert to fraction form
    82.25/123.42 = 53.34/x
  3. Step 3: Cross multiply
    82.25x = 123.42 × 53.34
  4. Step 4: Simplify right side
    82.25x = 6,582.61
  5. Step 5: Solve for x
    x = 6,582.61/82.25
  6. Step 6: Final answer
    x = 80.03

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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.