Home / 78,321.20-108,083.36-42,511.22

Finding the Fourth Proportional to 78,321.20, 108,083.36 and 42,511.22

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Solution

The fourth proportional to 78,321.20, 108,083.36 and 42,511.22 is: 58,665.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,321.20 : 108,083.36 = 42,511.22 : x
  2. Step 2: Convert to fraction form
    78,321.20/108,083.36 = 42,511.22/x
  3. Step 3: Cross multiply
    78,321.20x = 108,083.36 × 42,511.22
  4. Step 4: Simplify right side
    78,321.20x = 4,594,755,143.13
  5. Step 5: Solve for x
    x = 4,594,755,143.13/78,321.20
  6. Step 6: Final answer
    x = 58,665.54

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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.