Home / 138,357.76-190,933.92-80,986.66

Finding the Fourth Proportional to 138,357.76, 190,933.92 and 80,986.66

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Solution

The fourth proportional to 138,357.76, 190,933.92 and 80,986.66 is: 111,761.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,357.76 : 190,933.92 = 80,986.66 : x
  2. Step 2: Convert to fraction form
    138,357.76/190,933.92 = 80,986.66/x
  3. Step 3: Cross multiply
    138,357.76x = 190,933.92 × 80,986.66
  4. Step 4: Simplify right side
    138,357.76x = 15,463,100,461.51
  5. Step 5: Solve for x
    x = 15,463,100,461.51/138,357.76
  6. Step 6: Final answer
    x = 111,761.71

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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.