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Finding the Fourth Proportional to 99,979.92, 149,920.44 and 33,397.20

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Solution

The fourth proportional to 99,979.92, 149,920.44 and 33,397.20 is: 50,079.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979.92 : 149,920.44 = 33,397.20 : x
  2. Step 2: Convert to fraction form
    99,979.92/149,920.44 = 33,397.20/x
  3. Step 3: Cross multiply
    99,979.92x = 149,920.44 × 33,397.20
  4. Step 4: Simplify right side
    99,979.92x = 5,006,922,918.77
  5. Step 5: Solve for x
    x = 5,006,922,918.77/99,979.92
  6. Step 6: Final answer
    x = 50,079.29

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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.