Home / 76,942.70-115,414.05-72,277.10

Finding the Fourth Proportional to 76,942.70, 115,414.05 and 72,277.10

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Solution

The fourth proportional to 76,942.70, 115,414.05 and 72,277.10 is: 108,415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,942.70 : 115,414.05 = 72,277.10 : x
  2. Step 2: Convert to fraction form
    76,942.70/115,414.05 = 72,277.10/x
  3. Step 3: Cross multiply
    76,942.70x = 115,414.05 × 72,277.10
  4. Step 4: Simplify right side
    76,942.70x = 8,341,792,833.26
  5. Step 5: Solve for x
    x = 8,341,792,833.26/76,942.70
  6. Step 6: Final answer
    x = 108,415.65

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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.