Home / 78,631.92-108,512.82-42,822.36

Finding the Fourth Proportional to 78,631.92, 108,512.82 and 42,822.36

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Solution

The fourth proportional to 78,631.92, 108,512.82 and 42,822.36 is: 59,095.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.92 : 108,512.82 = 42,822.36 : x
  2. Step 2: Convert to fraction form
    78,631.92/108,512.82 = 42,822.36/x
  3. Step 3: Cross multiply
    78,631.92x = 108,512.82 × 42,822.36
  4. Step 4: Simplify right side
    78,631.92x = 4,646,775,042.66
  5. Step 5: Solve for x
    x = 4,646,775,042.66/78,631.92
  6. Step 6: Final answer
    x = 59,095.28

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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.