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Finding the Fourth Proportional to 99.41, 149.90 and 94.59

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Solution

The fourth proportional to 99.41, 149.90 and 94.59 is: 142.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.41 : 149.90 = 94.59 : x
  2. Step 2: Convert to fraction form
    99.41/149.90 = 94.59/x
  3. Step 3: Cross multiply
    99.41x = 149.90 × 94.59
  4. Step 4: Simplify right side
    99.41x = 14,178.57
  5. Step 5: Solve for x
    x = 14,178.57/99.41
  6. Step 6: Final answer
    x = 142.63

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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.