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Finding the Fourth Proportional to 203.72, 305.51 and 117.05

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Solution

The fourth proportional to 203.72, 305.51 and 117.05 is: 175.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.72 : 305.51 = 117.05 : x
  2. Step 2: Convert to fraction form
    203.72/305.51 = 117.05/x
  3. Step 3: Cross multiply
    203.72x = 305.51 × 117.05
  4. Step 4: Simplify right side
    203.72x = 35,757.83
  5. Step 5: Solve for x
    x = 35,757.83/203.72
  6. Step 6: Final answer
    x = 175.53

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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.