Home / 189,105.09-283,626.60-76,780.77

Finding the Fourth Proportional to 189,105.09, 283,626.60 and 76,780.77

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Solution

The fourth proportional to 189,105.09, 283,626.60 and 76,780.77 is: 115,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,105.09 : 283,626.60 = 76,780.77 : x
  2. Step 2: Convert to fraction form
    189,105.09/283,626.60 = 76,780.77/x
  3. Step 3: Cross multiply
    189,105.09x = 283,626.60 × 76,780.77
  4. Step 4: Simplify right side
    189,105.09x = 21,777,068,740.48
  5. Step 5: Solve for x
    x = 21,777,068,740.48/189,105.09
  6. Step 6: Final answer
    x = 115,158.55

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1.5x scale

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.