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Finding the Fourth Proportional to 185.15, 277.75 and 77.02

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Solution

The fourth proportional to 185.15, 277.75 and 77.02 is: 115.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.15 : 277.75 = 77.02 : x
  2. Step 2: Convert to fraction form
    185.15/277.75 = 77.02/x
  3. Step 3: Cross multiply
    185.15x = 277.75 × 77.02
  4. Step 4: Simplify right side
    185.15x = 21,390.92
  5. Step 5: Solve for x
    x = 21,390.92/185.15
  6. Step 6: Final answer
    x = 115.53

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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.