Home / 135,943.20-203,914.80-86,079.60

Finding the Fourth Proportional to 135,943.20, 203,914.80 and 86,079.60

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Solution

The fourth proportional to 135,943.20, 203,914.80 and 86,079.60 is: 129,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,943.20 : 203,914.80 = 86,079.60 : x
  2. Step 2: Convert to fraction form
    135,943.20/203,914.80 = 86,079.60/x
  3. Step 3: Cross multiply
    135,943.20x = 203,914.80 × 86,079.60
  4. Step 4: Simplify right side
    135,943.20x = 17,552,904,418.08
  5. Step 5: Solve for x
    x = 17,552,904,418.08/135,943.20
  6. Step 6: Final answer
    x = 129,119.40

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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.