Home / 78,979.92-108,995.22-43,172.36

Finding the Fourth Proportional to 78,979.92, 108,995.22 and 43,172.36

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Solution

The fourth proportional to 78,979.92, 108,995.22 and 43,172.36 is: 59,579.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,979.92 : 108,995.22 = 43,172.36 : x
  2. Step 2: Convert to fraction form
    78,979.92/108,995.22 = 43,172.36/x
  3. Step 3: Cross multiply
    78,979.92x = 108,995.22 × 43,172.36
  4. Step 4: Simplify right side
    78,979.92x = 4,705,580,876.12
  5. Step 5: Solve for x
    x = 4,705,580,876.12/78,979.92
  6. Step 6: Final answer
    x = 59,579.46

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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.