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Finding the Fourth Proportional to 47.99, 72.06 and 42.33

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Solution

The fourth proportional to 47.99, 72.06 and 42.33 is: 63.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.99 : 72.06 = 42.33 : x
  2. Step 2: Convert to fraction form
    47.99/72.06 = 42.33/x
  3. Step 3: Cross multiply
    47.99x = 72.06 × 42.33
  4. Step 4: Simplify right side
    47.99x = 3,050.30
  5. Step 5: Solve for x
    x = 3,050.30/47.99
  6. Step 6: Final answer
    x = 63.56

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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.