Home / 86,933.20-130,351.20-40,128.16

Finding the Fourth Proportional to 86,933.20, 130,351.20 and 40,128.16

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Solution

The fourth proportional to 86,933.20, 130,351.20 and 40,128.16 is: 60,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,933.20 : 130,351.20 = 40,128.16 : x
  2. Step 2: Convert to fraction form
    86,933.20/130,351.20 = 40,128.16/x
  3. Step 3: Cross multiply
    86,933.20x = 130,351.20 × 40,128.16
  4. Step 4: Simplify right side
    86,933.20x = 5,230,753,809.79
  5. Step 5: Solve for x
    x = 5,230,753,809.79/86,933.20
  6. Step 6: Final answer
    x = 60,169.81

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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.