Home / 86,288.32-129,491.61-30,128.44

Finding the Fourth Proportional to 86,288.32, 129,491.61 and 30,128.44

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Solution

The fourth proportional to 86,288.32, 129,491.61 and 30,128.44 is: 45,213.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,288.32 : 129,491.61 = 30,128.44 : x
  2. Step 2: Convert to fraction form
    86,288.32/129,491.61 = 30,128.44/x
  3. Step 3: Cross multiply
    86,288.32x = 129,491.61 × 30,128.44
  4. Step 4: Simplify right side
    86,288.32x = 3,901,380,202.39
  5. Step 5: Solve for x
    x = 3,901,380,202.39/86,288.32
  6. Step 6: Final answer
    x = 45,213.31

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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.