Home / 81,110.03-111,118.88-78,077.70

Finding the Fourth Proportional to 81,110.03, 111,118.88 and 78,077.70

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Solution

The fourth proportional to 81,110.03, 111,118.88 and 78,077.70 is: 106,964.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,110.03 : 111,118.88 = 78,077.70 : x
  2. Step 2: Convert to fraction form
    81,110.03/111,118.88 = 78,077.70/x
  3. Step 3: Cross multiply
    81,110.03x = 111,118.88 × 78,077.70
  4. Step 4: Simplify right side
    81,110.03x = 8,675,906,576.98
  5. Step 5: Solve for x
    x = 8,675,906,576.98/81,110.03
  6. Step 6: Final answer
    x = 106,964.66

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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.