Home / 138,514.37-191,125.73-81,905.09

Finding the Fourth Proportional to 138,514.37, 191,125.73 and 81,905.09

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Solution

The fourth proportional to 138,514.37, 191,125.73 and 81,905.09 is: 113,014.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,514.37 : 191,125.73 = 81,905.09 : x
  2. Step 2: Convert to fraction form
    138,514.37/191,125.73 = 81,905.09/x
  3. Step 3: Cross multiply
    138,514.37x = 191,125.73 × 81,905.09
  4. Step 4: Simplify right side
    138,514.37x = 15,654,169,707.44
  5. Step 5: Solve for x
    x = 15,654,169,707.44/138,514.37
  6. Step 6: Final answer
    x = 113,014.77

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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.