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Finding the Fourth Proportional to 82.17, 113.34 and 52.64

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Solution

The fourth proportional to 82.17, 113.34 and 52.64 is: 72.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.17 : 113.34 = 52.64 : x
  2. Step 2: Convert to fraction form
    82.17/113.34 = 52.64/x
  3. Step 3: Cross multiply
    82.17x = 113.34 × 52.64
  4. Step 4: Simplify right side
    82.17x = 5,965.39
  5. Step 5: Solve for x
    x = 5,965.39/82.17
  6. Step 6: Final answer
    x = 72.60

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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.