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Finding the Fourth Proportional to 72.47, 100.03 and 44.45

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Solution

The fourth proportional to 72.47, 100.03 and 44.45 is: 61.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.47 : 100.03 = 44.45 : x
  2. Step 2: Convert to fraction form
    72.47/100.03 = 44.45/x
  3. Step 3: Cross multiply
    72.47x = 100.03 × 44.45
  4. Step 4: Simplify right side
    72.47x = 4,446.33
  5. Step 5: Solve for x
    x = 4,446.33/72.47
  6. Step 6: Final answer
    x = 61.35

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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.