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Finding the Fourth Proportional to 82.72, 114.08 and 65.44

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Solution

The fourth proportional to 82.72, 114.08 and 65.44 is: 90.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.72 : 114.08 = 65.44 : x
  2. Step 2: Convert to fraction form
    82.72/114.08 = 65.44/x
  3. Step 3: Cross multiply
    82.72x = 114.08 × 65.44
  4. Step 4: Simplify right side
    82.72x = 7,465.40
  5. Step 5: Solve for x
    x = 7,465.40/82.72
  6. Step 6: Final answer
    x = 90.25

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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.