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Finding the Fourth Proportional to 73.04, 109.39 and 57.79

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Solution

The fourth proportional to 73.04, 109.39 and 57.79 is: 86.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.04 : 109.39 = 57.79 : x
  2. Step 2: Convert to fraction form
    73.04/109.39 = 57.79/x
  3. Step 3: Cross multiply
    73.04x = 109.39 × 57.79
  4. Step 4: Simplify right side
    73.04x = 6,321.65
  5. Step 5: Solve for x
    x = 6,321.65/73.04
  6. Step 6: Final answer
    x = 86.55

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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.