Home / 85,976.20-128,964.30-36,039.70

Finding the Fourth Proportional to 85,976.20, 128,964.30 and 36,039.70

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Solution

The fourth proportional to 85,976.20, 128,964.30 and 36,039.70 is: 54,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,976.20 : 128,964.30 = 36,039.70 : x
  2. Step 2: Convert to fraction form
    85,976.20/128,964.30 = 36,039.70/x
  3. Step 3: Cross multiply
    85,976.20x = 128,964.30 × 36,039.70
  4. Step 4: Simplify right side
    85,976.20x = 4,647,834,682.71
  5. Step 5: Solve for x
    x = 4,647,834,682.71/85,976.20
  6. Step 6: Final answer
    x = 54,059.55

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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.