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Finding the Fourth Proportional to 135.37, 186.80 and 76.36

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Solution

The fourth proportional to 135.37, 186.80 and 76.36 is: 105.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.37 : 186.80 = 76.36 : x
  2. Step 2: Convert to fraction form
    135.37/186.80 = 76.36/x
  3. Step 3: Cross multiply
    135.37x = 186.80 × 76.36
  4. Step 4: Simplify right side
    135.37x = 14,264.05
  5. Step 5: Solve for x
    x = 14,264.05/135.37
  6. Step 6: Final answer
    x = 105.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.