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Finding the Fourth Proportional to 126.61, 188.85 and 107.47

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Solution

The fourth proportional to 126.61, 188.85 and 107.47 is: 160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.61 : 188.85 = 107.47 : x
  2. Step 2: Convert to fraction form
    126.61/188.85 = 107.47/x
  3. Step 3: Cross multiply
    126.61x = 188.85 × 107.47
  4. Step 4: Simplify right side
    126.61x = 20,295.24
  5. Step 5: Solve for x
    x = 20,295.24/126.61
  6. Step 6: Final answer
    x = 160.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.