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Finding the Fourth Proportional to 68.08, 101.50 and 64.28

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Solution

The fourth proportional to 68.08, 101.50 and 64.28 is: 95.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.08 : 101.50 = 64.28 : x
  2. Step 2: Convert to fraction form
    68.08/101.50 = 64.28/x
  3. Step 3: Cross multiply
    68.08x = 101.50 × 64.28
  4. Step 4: Simplify right side
    68.08x = 6,524.42
  5. Step 5: Solve for x
    x = 6,524.42/68.08
  6. Step 6: Final answer
    x = 95.83

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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.