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Finding the Fourth Proportional to 72,218.39, 108,374.36 and 38,961.41

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Solution

The fourth proportional to 72,218.39, 108,374.36 and 38,961.41 is: 58,467.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,218.39 : 108,374.36 = 38,961.41 : x
  2. Step 2: Convert to fraction form
    72,218.39/108,374.36 = 38,961.41/x
  3. Step 3: Cross multiply
    72,218.39x = 108,374.36 × 38,961.41
  4. Step 4: Simplify right side
    72,218.39x = 4,222,417,136.77
  5. Step 5: Solve for x
    x = 4,222,417,136.77/72,218.39
  6. Step 6: Final answer
    x = 58,467.34

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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.