Home / 138,515.37-191,127.10-81,906.09

Finding the Fourth Proportional to 138,515.37, 191,127.10 and 81,906.09

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Solution

The fourth proportional to 138,515.37, 191,127.10 and 81,906.09 is: 113,016.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,515.37 : 191,127.10 = 81,906.09 : x
  2. Step 2: Convert to fraction form
    138,515.37/191,127.10 = 81,906.09/x
  3. Step 3: Cross multiply
    138,515.37x = 191,127.10 × 81,906.09
  4. Step 4: Simplify right side
    138,515.37x = 15,654,473,454.04
  5. Step 5: Solve for x
    x = 15,654,473,454.04/138,515.37
  6. Step 6: Final answer
    x = 113,016.15

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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.