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Finding the Fourth Proportional to 134.81, 202.31 and 69.83

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Solution

The fourth proportional to 134.81, 202.31 and 69.83 is: 104.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.81 : 202.31 = 69.83 : x
  2. Step 2: Convert to fraction form
    134.81/202.31 = 69.83/x
  3. Step 3: Cross multiply
    134.81x = 202.31 × 69.83
  4. Step 4: Simplify right side
    134.81x = 14,126.96
  5. Step 5: Solve for x
    x = 14,126.96/134.81
  6. Step 6: Final answer
    x = 104.79

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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.