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Finding the Fourth Proportional to 185.21, 277.95 and 77.07

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Solution

The fourth proportional to 185.21, 277.95 and 77.07 is: 115.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.21 : 277.95 = 77.07 : x
  2. Step 2: Convert to fraction form
    185.21/277.95 = 77.07/x
  3. Step 3: Cross multiply
    185.21x = 277.95 × 77.07
  4. Step 4: Simplify right side
    185.21x = 21,421.61
  5. Step 5: Solve for x
    x = 21,421.61/185.21
  6. Step 6: Final answer
    x = 115.66

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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.