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Finding the Fourth Proportional to 66.72, 100.03 and 44.99

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Solution

The fourth proportional to 66.72, 100.03 and 44.99 is: 67.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.72 : 100.03 = 44.99 : x
  2. Step 2: Convert to fraction form
    66.72/100.03 = 44.99/x
  3. Step 3: Cross multiply
    66.72x = 100.03 × 44.99
  4. Step 4: Simplify right side
    66.72x = 4,500.25
  5. Step 5: Solve for x
    x = 4,500.25/66.72
  6. Step 6: Final answer
    x = 67.45

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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.