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Finding the Fourth Proportional to 47.49, 71.13 and 46.12

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Solution

The fourth proportional to 47.49, 71.13 and 46.12 is: 69.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.49 : 71.13 = 46.12 : x
  2. Step 2: Convert to fraction form
    47.49/71.13 = 46.12/x
  3. Step 3: Cross multiply
    47.49x = 71.13 × 46.12
  4. Step 4: Simplify right side
    47.49x = 3,280.81
  5. Step 5: Solve for x
    x = 3,280.81/47.49
  6. Step 6: Final answer
    x = 69.08

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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.