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Finding the Fourth Proportional to 69.93, 104.72 and 48.20

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Solution

The fourth proportional to 69.93, 104.72 and 48.20 is: 72.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.93 : 104.72 = 48.20 : x
  2. Step 2: Convert to fraction form
    69.93/104.72 = 48.20/x
  3. Step 3: Cross multiply
    69.93x = 104.72 × 48.20
  4. Step 4: Simplify right side
    69.93x = 5,047.08
  5. Step 5: Solve for x
    x = 5,047.08/69.93
  6. Step 6: Final answer
    x = 72.18

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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.