Home / 78,786.44-108,725.60-42,977.20

Finding the Fourth Proportional to 78,786.44, 108,725.60 and 42,977.20

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Solution

The fourth proportional to 78,786.44, 108,725.60 and 42,977.20 is: 59,308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.44 : 108,725.60 = 42,977.20 : x
  2. Step 2: Convert to fraction form
    78,786.44/108,725.60 = 42,977.20/x
  3. Step 3: Cross multiply
    78,786.44x = 108,725.60 × 42,977.20
  4. Step 4: Simplify right side
    78,786.44x = 4,672,721,856.32
  5. Step 5: Solve for x
    x = 4,672,721,856.32/78,786.44
  6. Step 6: Final answer
    x = 59,308.71

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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.