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Finding the Fourth Proportional to 68.16, 93.44 and 67.04

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Solution

The fourth proportional to 68.16, 93.44 and 67.04 is: 91.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.16 : 93.44 = 67.04 : x
  2. Step 2: Convert to fraction form
    68.16/93.44 = 67.04/x
  3. Step 3: Cross multiply
    68.16x = 93.44 × 67.04
  4. Step 4: Simplify right side
    68.16x = 6,264.22
  5. Step 5: Solve for x
    x = 6,264.22/68.16
  6. Step 6: Final answer
    x = 91.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.