Home / 138,610.58-191,282.32-78,181.04

Finding the Fourth Proportional to 138,610.58, 191,282.32 and 78,181.04

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Solution

The fourth proportional to 138,610.58, 191,282.32 and 78,181.04 is: 107,889.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,610.58 : 191,282.32 = 78,181.04 : x
  2. Step 2: Convert to fraction form
    138,610.58/191,282.32 = 78,181.04/x
  3. Step 3: Cross multiply
    138,610.58x = 191,282.32 × 78,181.04
  4. Step 4: Simplify right side
    138,610.58x = 14,954,650,711.21
  5. Step 5: Solve for x
    x = 14,954,650,711.21/138,610.58
  6. Step 6: Final answer
    x = 107,889.68

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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.