Home / 78,350.49-117,429.21-30,917.97

Finding the Fourth Proportional to 78,350.49, 117,429.21 and 30,917.97

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Solution

The fourth proportional to 78,350.49, 117,429.21 and 30,917.97 is: 46,338.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,350.49 : 117,429.21 = 30,917.97 : x
  2. Step 2: Convert to fraction form
    78,350.49/117,429.21 = 30,917.97/x
  3. Step 3: Cross multiply
    78,350.49x = 117,429.21 × 30,917.97
  4. Step 4: Simplify right side
    78,350.49x = 3,630,672,791.90
  5. Step 5: Solve for x
    x = 3,630,672,791.90/78,350.49
  6. Step 6: Final answer
    x = 46,338.87

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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.