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Finding the Fourth Proportional to 100.12, 150.09 and 45.97

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Solution

The fourth proportional to 100.12, 150.09 and 45.97 is: 68.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.12 : 150.09 = 45.97 : x
  2. Step 2: Convert to fraction form
    100.12/150.09 = 45.97/x
  3. Step 3: Cross multiply
    100.12x = 150.09 × 45.97
  4. Step 4: Simplify right side
    100.12x = 6,899.64
  5. Step 5: Solve for x
    x = 6,899.64/100.12
  6. Step 6: Final answer
    x = 68.91

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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.