Home / 138,816.18-191,568.24-81,498.56

Finding the Fourth Proportional to 138,816.18, 191,568.24 and 81,498.56

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Solution

The fourth proportional to 138,816.18, 191,568.24 and 81,498.56 is: 112,469.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,816.18 : 191,568.24 = 81,498.56 : x
  2. Step 2: Convert to fraction form
    138,816.18/191,568.24 = 81,498.56/x
  3. Step 3: Cross multiply
    138,816.18x = 191,568.24 × 81,498.56
  4. Step 4: Simplify right side
    138,816.18x = 15,612,534,743.89
  5. Step 5: Solve for x
    x = 15,612,534,743.89/138,816.18
  6. Step 6: Final answer
    x = 112,469.13

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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.