Home / 85,836.20-128,711.10-50,786.60

Finding the Fourth Proportional to 85,836.20, 128,711.10 and 50,786.60

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Solution

The fourth proportional to 85,836.20, 128,711.10 and 50,786.60 is: 76,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,836.20 : 128,711.10 = 50,786.60 : x
  2. Step 2: Convert to fraction form
    85,836.20/128,711.10 = 50,786.60/x
  3. Step 3: Cross multiply
    85,836.20x = 128,711.10 × 50,786.60
  4. Step 4: Simplify right side
    85,836.20x = 6,536,799,151.26
  5. Step 5: Solve for x
    x = 6,536,799,151.26/85,836.20
  6. Step 6: Final answer
    x = 76,154.34

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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.