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Finding the Fourth Proportional to 100.90, 151.99 and 94.42

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Solution

The fourth proportional to 100.90, 151.99 and 94.42 is: 142.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.90 : 151.99 = 94.42 : x
  2. Step 2: Convert to fraction form
    100.90/151.99 = 94.42/x
  3. Step 3: Cross multiply
    100.90x = 151.99 × 94.42
  4. Step 4: Simplify right side
    100.90x = 14,350.90
  5. Step 5: Solve for x
    x = 14,350.90/100.90
  6. Step 6: Final answer
    x = 142.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.