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Finding the Fourth Proportional to 175.08, 262.44 and 78.78

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Solution

The fourth proportional to 175.08, 262.44 and 78.78 is: 118.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.08 : 262.44 = 78.78 : x
  2. Step 2: Convert to fraction form
    175.08/262.44 = 78.78/x
  3. Step 3: Cross multiply
    175.08x = 262.44 × 78.78
  4. Step 4: Simplify right side
    175.08x = 20,675.02
  5. Step 5: Solve for x
    x = 20,675.02/175.08
  6. Step 6: Final answer
    x = 118.09

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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.