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Finding the Fourth Proportional to 151.58, 208.98 and 126.68

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Solution

The fourth proportional to 151.58, 208.98 and 126.68 is: 174.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.58 : 208.98 = 126.68 : x
  2. Step 2: Convert to fraction form
    151.58/208.98 = 126.68/x
  3. Step 3: Cross multiply
    151.58x = 208.98 × 126.68
  4. Step 4: Simplify right side
    151.58x = 26,472.54
  5. Step 5: Solve for x
    x = 26,472.54/151.58
  6. Step 6: Final answer
    x = 174.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.