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Finding the Fourth Proportional to 48.06, 71.55 and 47.79

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Solution

The fourth proportional to 48.06, 71.55 and 47.79 is: 71.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.06 : 71.55 = 47.79 : x
  2. Step 2: Convert to fraction form
    48.06/71.55 = 47.79/x
  3. Step 3: Cross multiply
    48.06x = 71.55 × 47.79
  4. Step 4: Simplify right side
    48.06x = 3,419.37
  5. Step 5: Solve for x
    x = 3,419.37/48.06
  6. Step 6: Final answer
    x = 71.15

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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.