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Finding the Fourth Proportional to 68.01, 101.82 and 47.70

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Solution

The fourth proportional to 68.01, 101.82 and 47.70 is: 71.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.01 : 101.82 = 47.70 : x
  2. Step 2: Convert to fraction form
    68.01/101.82 = 47.70/x
  3. Step 3: Cross multiply
    68.01x = 101.82 × 47.70
  4. Step 4: Simplify right side
    68.01x = 4,856.81
  5. Step 5: Solve for x
    x = 4,856.81/68.01
  6. Step 6: Final answer
    x = 71.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.