Home / 80,406.05-111,468.56-76,140.20

Finding the Fourth Proportional to 80,406.05, 111,468.56 and 76,140.20

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Solution

The fourth proportional to 80,406.05, 111,468.56 and 76,140.20 is: 105,554.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,406.05 : 111,468.56 = 76,140.20 : x
  2. Step 2: Convert to fraction form
    80,406.05/111,468.56 = 76,140.20/x
  3. Step 3: Cross multiply
    80,406.05x = 111,468.56 × 76,140.20
  4. Step 4: Simplify right side
    80,406.05x = 8,487,238,350.08
  5. Step 5: Solve for x
    x = 8,487,238,350.08/80,406.05
  6. Step 6: Final answer
    x = 105,554.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.