Home / 78,819.15-108,768.38-43,009.59

Finding the Fourth Proportional to 78,819.15, 108,768.38 and 43,009.59

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Solution

The fourth proportional to 78,819.15, 108,768.38 and 43,009.59 is: 59,352.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,819.15 : 108,768.38 = 43,009.59 : x
  2. Step 2: Convert to fraction form
    78,819.15/108,768.38 = 43,009.59/x
  3. Step 3: Cross multiply
    78,819.15x = 108,768.38 × 43,009.59
  4. Step 4: Simplify right side
    78,819.15x = 4,678,083,213.72
  5. Step 5: Solve for x
    x = 4,678,083,213.72/78,819.15
  6. Step 6: Final answer
    x = 59,352.11

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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.