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Finding the Fourth Proportional to 77.93, 116.91 and 29.19

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Solution

The fourth proportional to 77.93, 116.91 and 29.19 is: 43.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.93 : 116.91 = 29.19 : x
  2. Step 2: Convert to fraction form
    77.93/116.91 = 29.19/x
  3. Step 3: Cross multiply
    77.93x = 116.91 × 29.19
  4. Step 4: Simplify right side
    77.93x = 3,412.60
  5. Step 5: Solve for x
    x = 3,412.60/77.93
  6. Step 6: Final answer
    x = 43.79

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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.