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Finding the Fourth Proportional to 77.08, 115.50 and 44.50

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Solution

The fourth proportional to 77.08, 115.50 and 44.50 is: 66.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.08 : 115.50 = 44.50 : x
  2. Step 2: Convert to fraction form
    77.08/115.50 = 44.50/x
  3. Step 3: Cross multiply
    77.08x = 115.50 × 44.50
  4. Step 4: Simplify right side
    77.08x = 5,139.72
  5. Step 5: Solve for x
    x = 5,139.72/77.08
  6. Step 6: Final answer
    x = 66.68

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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.