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Finding the Fourth Proportional to 151.70, 209.05 and 110.21

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Solution

The fourth proportional to 151.70, 209.05 and 110.21 is: 151.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.70 : 209.05 = 110.21 : x
  2. Step 2: Convert to fraction form
    151.70/209.05 = 110.21/x
  3. Step 3: Cross multiply
    151.70x = 209.05 × 110.21
  4. Step 4: Simplify right side
    151.70x = 23,038.08
  5. Step 5: Solve for x
    x = 23,038.08/151.70
  6. Step 6: Final answer
    x = 151.87

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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.