Home / 138,896.64-191,667.39-81,538.29

Finding the Fourth Proportional to 138,896.64, 191,667.39 and 81,538.29

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Solution

The fourth proportional to 138,896.64, 191,667.39 and 81,538.29 is: 112,516.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,896.64 : 191,667.39 = 81,538.29 : x
  2. Step 2: Convert to fraction form
    138,896.64/191,667.39 = 81,538.29/x
  3. Step 3: Cross multiply
    138,896.64x = 191,667.39 × 81,538.29
  4. Step 4: Simplify right side
    138,896.64x = 15,628,231,229.36
  5. Step 5: Solve for x
    x = 15,628,231,229.36/138,896.64
  6. Step 6: Final answer
    x = 112,516.99

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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.