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Finding the Fourth Proportional to 151.70, 209.34 and 114.80

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Solution

The fourth proportional to 151.70, 209.34 and 114.80 is: 158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.70 : 209.34 = 114.80 : x
  2. Step 2: Convert to fraction form
    151.70/209.34 = 114.80/x
  3. Step 3: Cross multiply
    151.70x = 209.34 × 114.80
  4. Step 4: Simplify right side
    151.70x = 24,032.23
  5. Step 5: Solve for x
    x = 24,032.23/151.70
  6. Step 6: Final answer
    x = 158.42

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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.