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Finding the Fourth Proportional to 47.18, 70.81 and 35.73

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Solution

The fourth proportional to 47.18, 70.81 and 35.73 is: 53.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.18 : 70.81 = 35.73 : x
  2. Step 2: Convert to fraction form
    47.18/70.81 = 35.73/x
  3. Step 3: Cross multiply
    47.18x = 70.81 × 35.73
  4. Step 4: Simplify right side
    47.18x = 2,529.95
  5. Step 5: Solve for x
    x = 2,529.95/47.18
  6. Step 6: Final answer
    x = 53.62

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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.