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Finding the Fourth Proportional to 72.51, 100.05 and 44.87

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Solution

The fourth proportional to 72.51, 100.05 and 44.87 is: 61.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.51 : 100.05 = 44.87 : x
  2. Step 2: Convert to fraction form
    72.51/100.05 = 44.87/x
  3. Step 3: Cross multiply
    72.51x = 100.05 × 44.87
  4. Step 4: Simplify right side
    72.51x = 4,489.24
  5. Step 5: Solve for x
    x = 4,489.24/72.51
  6. Step 6: Final answer
    x = 61.91

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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.