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Finding the Fourth Proportional to 119.00, 178.38 and 77.88

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Solution

The fourth proportional to 119.00, 178.38 and 77.88 is: 116.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.00 : 178.38 = 77.88 : x
  2. Step 2: Convert to fraction form
    119.00/178.38 = 77.88/x
  3. Step 3: Cross multiply
    119.00x = 178.38 × 77.88
  4. Step 4: Simplify right side
    119.00x = 13,892.23
  5. Step 5: Solve for x
    x = 13,892.23/119.00
  6. Step 6: Final answer
    x = 116.75

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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.