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Finding the Fourth Proportional to 82.06, 123.11 and 43.57

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Solution

The fourth proportional to 82.06, 123.11 and 43.57 is: 65.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.06 : 123.11 = 43.57 : x
  2. Step 2: Convert to fraction form
    82.06/123.11 = 43.57/x
  3. Step 3: Cross multiply
    82.06x = 123.11 × 43.57
  4. Step 4: Simplify right side
    82.06x = 5,364.00
  5. Step 5: Solve for x
    x = 5,364.00/82.06
  6. Step 6: Final answer
    x = 65.37

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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.