Home / 138,215.45-190,763.42-86,556.56

Finding the Fourth Proportional to 138,215.45, 190,763.42 and 86,556.56

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Solution

The fourth proportional to 138,215.45, 190,763.42 and 86,556.56 is: 119,464.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,215.45 : 190,763.42 = 86,556.56 : x
  2. Step 2: Convert to fraction form
    138,215.45/190,763.42 = 86,556.56/x
  3. Step 3: Cross multiply
    138,215.45x = 190,763.42 × 86,556.56
  4. Step 4: Simplify right side
    138,215.45x = 16,511,824,022.44
  5. Step 5: Solve for x
    x = 16,511,824,022.44/138,215.45
  6. Step 6: Final answer
    x = 119,464.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.