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Finding the Fourth Proportional to 135.16, 202.74 and 54.00

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Solution

The fourth proportional to 135.16, 202.74 and 54.00 is: 80.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.16 : 202.74 = 54.00 : x
  2. Step 2: Convert to fraction form
    135.16/202.74 = 54.00/x
  3. Step 3: Cross multiply
    135.16x = 202.74 × 54.00
  4. Step 4: Simplify right side
    135.16x = 10,946.68
  5. Step 5: Solve for x
    x = 10,946.68/135.16
  6. Step 6: Final answer
    x = 80.99

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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.