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Finding the Fourth Proportional to 99.56, 149.31 and 35.43

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Solution

The fourth proportional to 99.56, 149.31 and 35.43 is: 53.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.56 : 149.31 = 35.43 : x
  2. Step 2: Convert to fraction form
    99.56/149.31 = 35.43/x
  3. Step 3: Cross multiply
    99.56x = 149.31 × 35.43
  4. Step 4: Simplify right side
    99.56x = 5,290.05
  5. Step 5: Solve for x
    x = 5,290.05/99.56
  6. Step 6: Final answer
    x = 53.14

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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.