Home / 138,922.08-191,712.51-81,550.09

Finding the Fourth Proportional to 138,922.08, 191,712.51 and 81,550.09

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Solution

The fourth proportional to 138,922.08, 191,712.51 and 81,550.09 is: 112,539.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,922.08 : 191,712.51 = 81,550.09 : x
  2. Step 2: Convert to fraction form
    138,922.08/191,712.51 = 81,550.09/x
  3. Step 3: Cross multiply
    138,922.08x = 191,712.51 × 81,550.09
  4. Step 4: Simplify right side
    138,922.08x = 15,634,171,078.31
  5. Step 5: Solve for x
    x = 15,634,171,078.31/138,922.08
  6. Step 6: Final answer
    x = 112,539.14

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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.