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Finding the Fourth Proportional to 151.60, 209.26 and 107.98

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Solution

The fourth proportional to 151.60, 209.26 and 107.98 is: 149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.60 : 209.26 = 107.98 : x
  2. Step 2: Convert to fraction form
    151.60/209.26 = 107.98/x
  3. Step 3: Cross multiply
    151.60x = 209.26 × 107.98
  4. Step 4: Simplify right side
    151.60x = 22,595.89
  5. Step 5: Solve for x
    x = 22,595.89/151.60
  6. Step 6: Final answer
    x = 149.05

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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.