Home / 78,629.10-108,508.86-42,819.27

Finding the Fourth Proportional to 78,629.10, 108,508.86 and 42,819.27

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Solution

The fourth proportional to 78,629.10, 108,508.86 and 42,819.27 is: 59,090.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,629.10 : 108,508.86 = 42,819.27 : x
  2. Step 2: Convert to fraction form
    78,629.10/108,508.86 = 42,819.27/x
  3. Step 3: Cross multiply
    78,629.10x = 108,508.86 × 42,819.27
  4. Step 4: Simplify right side
    78,629.10x = 4,646,270,173.73
  5. Step 5: Solve for x
    x = 4,646,270,173.73/78,629.10
  6. Step 6: Final answer
    x = 59,090.97

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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.