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Finding the Fourth Proportional to 135.81, 203.47 and 130.81

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Solution

The fourth proportional to 135.81, 203.47 and 130.81 is: 195.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.81 : 203.47 = 130.81 : x
  2. Step 2: Convert to fraction form
    135.81/203.47 = 130.81/x
  3. Step 3: Cross multiply
    135.81x = 203.47 × 130.81
  4. Step 4: Simplify right side
    135.81x = 26,615.91
  5. Step 5: Solve for x
    x = 26,615.91/135.81
  6. Step 6: Final answer
    x = 195.98

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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.