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Finding the Fourth Proportional to 48.06, 71.78 and 45.43

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Solution

The fourth proportional to 48.06, 71.78 and 45.43 is: 67.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.06 : 71.78 = 45.43 : x
  2. Step 2: Convert to fraction form
    48.06/71.78 = 45.43/x
  3. Step 3: Cross multiply
    48.06x = 71.78 × 45.43
  4. Step 4: Simplify right side
    48.06x = 3,261.00
  5. Step 5: Solve for x
    x = 3,261.00/48.06
  6. Step 6: Final answer
    x = 67.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.