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Finding the Fourth Proportional to 186.06, 278.88 and 77.74

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Solution

The fourth proportional to 186.06, 278.88 and 77.74 is: 116.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.06 : 278.88 = 77.74 : x
  2. Step 2: Convert to fraction form
    186.06/278.88 = 77.74/x
  3. Step 3: Cross multiply
    186.06x = 278.88 × 77.74
  4. Step 4: Simplify right side
    186.06x = 21,680.13
  5. Step 5: Solve for x
    x = 21,680.13/186.06
  6. Step 6: Final answer
    x = 116.52

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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.