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Finding the Fourth Proportional to 135.84, 203.68 and 54.72

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Solution

The fourth proportional to 135.84, 203.68 and 54.72 is: 82.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.84 : 203.68 = 54.72 : x
  2. Step 2: Convert to fraction form
    135.84/203.68 = 54.72/x
  3. Step 3: Cross multiply
    135.84x = 203.68 × 54.72
  4. Step 4: Simplify right side
    135.84x = 11,145.37
  5. Step 5: Solve for x
    x = 11,145.37/135.84
  6. Step 6: Final answer
    x = 82.05

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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.