Home / 86,015.20-128,997.20-33,394.40

Finding the Fourth Proportional to 86,015.20, 128,997.20 and 33,394.40

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Solution

The fourth proportional to 86,015.20, 128,997.20 and 33,394.40 is: 50,081.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,015.20 : 128,997.20 = 33,394.40 : x
  2. Step 2: Convert to fraction form
    86,015.20/128,997.20 = 33,394.40/x
  3. Step 3: Cross multiply
    86,015.20x = 128,997.20 × 33,394.40
  4. Step 4: Simplify right side
    86,015.20x = 4,307,784,095.68
  5. Step 5: Solve for x
    x = 4,307,784,095.68/86,015.20
  6. Step 6: Final answer
    x = 50,081.66

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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.