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Finding the Fourth Proportional to 72.48, 100.03 and 44.87

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Solution

The fourth proportional to 72.48, 100.03 and 44.87 is: 61.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.48 : 100.03 = 44.87 : x
  2. Step 2: Convert to fraction form
    72.48/100.03 = 44.87/x
  3. Step 3: Cross multiply
    72.48x = 100.03 × 44.87
  4. Step 4: Simplify right side
    72.48x = 4,488.28
  5. Step 5: Solve for x
    x = 4,488.28/72.48
  6. Step 6: Final answer
    x = 61.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.