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Finding the Fourth Proportional to 60.82, 84.02 and 47.05

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Solution

The fourth proportional to 60.82, 84.02 and 47.05 is: 64.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.82 : 84.02 = 47.05 : x
  2. Step 2: Convert to fraction form
    60.82/84.02 = 47.05/x
  3. Step 3: Cross multiply
    60.82x = 84.02 × 47.05
  4. Step 4: Simplify right side
    60.82x = 3,952.70
  5. Step 5: Solve for x
    x = 3,952.70/60.82
  6. Step 6: Final answer
    x = 64.99

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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.