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Finding the Fourth Proportional to 45.55, 68.72 and 44.03

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Solution

The fourth proportional to 45.55, 68.72 and 44.03 is: 66.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.55 : 68.72 = 44.03 : x
  2. Step 2: Convert to fraction form
    45.55/68.72 = 44.03/x
  3. Step 3: Cross multiply
    45.55x = 68.72 × 44.03
  4. Step 4: Simplify right side
    45.55x = 3,025.74
  5. Step 5: Solve for x
    x = 3,025.74/45.55
  6. Step 6: Final answer
    x = 66.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.