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Finding the Fourth Proportional to 200.31, 300.51 and 72.06

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Solution

The fourth proportional to 200.31, 300.51 and 72.06 is: 108.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.31 : 300.51 = 72.06 : x
  2. Step 2: Convert to fraction form
    200.31/300.51 = 72.06/x
  3. Step 3: Cross multiply
    200.31x = 300.51 × 72.06
  4. Step 4: Simplify right side
    200.31x = 21,654.75
  5. Step 5: Solve for x
    x = 21,654.75/200.31
  6. Step 6: Final answer
    x = 108.11

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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.