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Finding the Fourth Proportional to 151.58, 208.84 and 129.41

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Solution

The fourth proportional to 151.58, 208.84 and 129.41 is: 178.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.58 : 208.84 = 129.41 : x
  2. Step 2: Convert to fraction form
    151.58/208.84 = 129.41/x
  3. Step 3: Cross multiply
    151.58x = 208.84 × 129.41
  4. Step 4: Simplify right side
    151.58x = 27,025.98
  5. Step 5: Solve for x
    x = 27,025.98/151.58
  6. Step 6: Final answer
    x = 178.30

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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.