Home / 81,107.03-111,114.77-78,074.70

Finding the Fourth Proportional to 81,107.03, 111,114.77 and 78,074.70

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Solution

The fourth proportional to 81,107.03, 111,114.77 and 78,074.70 is: 106,960.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,107.03 : 111,114.77 = 78,074.70 : x
  2. Step 2: Convert to fraction form
    81,107.03/111,114.77 = 78,074.70/x
  3. Step 3: Cross multiply
    81,107.03x = 111,114.77 × 78,074.70
  4. Step 4: Simplify right side
    81,107.03x = 8,675,252,333.32
  5. Step 5: Solve for x
    x = 8,675,252,333.32/81,107.03
  6. Step 6: Final answer
    x = 106,960.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.