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Finding the Fourth Proportional to 82,991.39, 124,487.01 and 30,404.97

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Solution

The fourth proportional to 82,991.39, 124,487.01 and 30,404.97 is: 45,607.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,991.39 : 124,487.01 = 30,404.97 : x
  2. Step 2: Convert to fraction form
    82,991.39/124,487.01 = 30,404.97/x
  3. Step 3: Cross multiply
    82,991.39x = 124,487.01 × 30,404.97
  4. Step 4: Simplify right side
    82,991.39x = 3,785,023,804.44
  5. Step 5: Solve for x
    x = 3,785,023,804.44/82,991.39
  6. Step 6: Final answer
    x = 45,607.43

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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.