Home / 138,553.42-191,205.85-81,179.01

Finding the Fourth Proportional to 138,553.42, 191,205.85 and 81,179.01

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Solution

The fourth proportional to 138,553.42, 191,205.85 and 81,179.01 is: 112,028.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,553.42 : 191,205.85 = 81,179.01 : x
  2. Step 2: Convert to fraction form
    138,553.42/191,205.85 = 81,179.01/x
  3. Step 3: Cross multiply
    138,553.42x = 191,205.85 × 81,179.01
  4. Step 4: Simplify right side
    138,553.42x = 15,521,901,609.21
  5. Step 5: Solve for x
    x = 15,521,901,609.21/138,553.42
  6. Step 6: Final answer
    x = 112,028.28

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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.