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Finding the Fourth Proportional to 68.13, 101.61 and 67.59

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Solution

The fourth proportional to 68.13, 101.61 and 67.59 is: 100.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.13 : 101.61 = 67.59 : x
  2. Step 2: Convert to fraction form
    68.13/101.61 = 67.59/x
  3. Step 3: Cross multiply
    68.13x = 101.61 × 67.59
  4. Step 4: Simplify right side
    68.13x = 6,867.82
  5. Step 5: Solve for x
    x = 6,867.82/68.13
  6. Step 6: Final answer
    x = 100.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.