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Finding the Fourth Proportional to 126.59, 189.86 and 113.36

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Solution

The fourth proportional to 126.59, 189.86 and 113.36 is: 170.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.59 : 189.86 = 113.36 : x
  2. Step 2: Convert to fraction form
    126.59/189.86 = 113.36/x
  3. Step 3: Cross multiply
    126.59x = 189.86 × 113.36
  4. Step 4: Simplify right side
    126.59x = 21,521.01
  5. Step 5: Solve for x
    x = 21,521.01/126.59
  6. Step 6: Final answer
    x = 170.01

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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.