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Finding the Fourth Proportional to 99.93, 149.85 and 92.14

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Solution

The fourth proportional to 99.93, 149.85 and 92.14 is: 138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.93 : 149.85 = 92.14 : x
  2. Step 2: Convert to fraction form
    99.93/149.85 = 92.14/x
  3. Step 3: Cross multiply
    99.93x = 149.85 × 92.14
  4. Step 4: Simplify right side
    99.93x = 13,806.80
  5. Step 5: Solve for x
    x = 13,806.80/99.93
  6. Step 6: Final answer
    x = 138.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.