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Finding the Fourth Proportional to 187.99, 282.08 and 79.79

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Solution

The fourth proportional to 187.99, 282.08 and 79.79 is: 119.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.99 : 282.08 = 79.79 : x
  2. Step 2: Convert to fraction form
    187.99/282.08 = 79.79/x
  3. Step 3: Cross multiply
    187.99x = 282.08 × 79.79
  4. Step 4: Simplify right side
    187.99x = 22,505.95
  5. Step 5: Solve for x
    x = 22,505.95/187.99
  6. Step 6: Final answer
    x = 119.72

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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.