Home / 78,190.92-117,308.25-30,776.76

Finding the Fourth Proportional to 78,190.92, 117,308.25 and 30,776.76

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Solution

The fourth proportional to 78,190.92, 117,308.25 and 30,776.76 is: 46,173.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.92 : 117,308.25 = 30,776.76 : x
  2. Step 2: Convert to fraction form
    78,190.92/117,308.25 = 30,776.76/x
  3. Step 3: Cross multiply
    78,190.92x = 117,308.25 × 30,776.76
  4. Step 4: Simplify right side
    78,190.92x = 3,610,367,856.27
  5. Step 5: Solve for x
    x = 3,610,367,856.27/78,190.92
  6. Step 6: Final answer
    x = 46,173.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.