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Finding the Fourth Proportional to 82.99, 114.65 and 68.59

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Solution

The fourth proportional to 82.99, 114.65 and 68.59 is: 94.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.99 : 114.65 = 68.59 : x
  2. Step 2: Convert to fraction form
    82.99/114.65 = 68.59/x
  3. Step 3: Cross multiply
    82.99x = 114.65 × 68.59
  4. Step 4: Simplify right side
    82.99x = 7,863.84
  5. Step 5: Solve for x
    x = 7,863.84/82.99
  6. Step 6: Final answer
    x = 94.76

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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.