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Finding the Fourth Proportional to 102.82, 154.00 and 99.02

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Solution

The fourth proportional to 102.82, 154.00 and 99.02 is: 148.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.82 : 154.00 = 99.02 : x
  2. Step 2: Convert to fraction form
    102.82/154.00 = 99.02/x
  3. Step 3: Cross multiply
    102.82x = 154.00 × 99.02
  4. Step 4: Simplify right side
    102.82x = 15,249.59
  5. Step 5: Solve for x
    x = 15,249.59/102.82
  6. Step 6: Final answer
    x = 148.31

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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.