Home / 138,553.61-191,206.10-81,179.20

Finding the Fourth Proportional to 138,553.61, 191,206.10 and 81,179.20

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Solution

The fourth proportional to 138,553.61, 191,206.10 and 81,179.20 is: 112,028.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,553.61 : 191,206.10 = 81,179.20 : x
  2. Step 2: Convert to fraction form
    138,553.61/191,206.10 = 81,179.20/x
  3. Step 3: Cross multiply
    138,553.61x = 191,206.10 × 81,179.20
  4. Step 4: Simplify right side
    138,553.61x = 15,521,957,599.54
  5. Step 5: Solve for x
    x = 15,521,957,599.54/138,553.61
  6. Step 6: Final answer
    x = 112,028.54

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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.