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Finding the Fourth Proportional to 142.73, 213.74 and 99.44

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Solution

The fourth proportional to 142.73, 213.74 and 99.44 is: 148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.73 : 213.74 = 99.44 : x
  2. Step 2: Convert to fraction form
    142.73/213.74 = 99.44/x
  3. Step 3: Cross multiply
    142.73x = 213.74 × 99.44
  4. Step 4: Simplify right side
    142.73x = 21,254.31
  5. Step 5: Solve for x
    x = 21,254.31/142.73
  6. Step 6: Final answer
    x = 148.91

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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.