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Finding the Fourth Proportional to 82.72, 114.11 and 55.08

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Solution

The fourth proportional to 82.72, 114.11 and 55.08 is: 75.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.72 : 114.11 = 55.08 : x
  2. Step 2: Convert to fraction form
    82.72/114.11 = 55.08/x
  3. Step 3: Cross multiply
    82.72x = 114.11 × 55.08
  4. Step 4: Simplify right side
    82.72x = 6,285.11
  5. Step 5: Solve for x
    x = 6,285.11/82.72
  6. Step 6: Final answer
    x = 75.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.