Home / 138,914.10-191,704.59-81,569.88

Finding the Fourth Proportional to 138,914.10, 191,704.59 and 81,569.88

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Solution

The fourth proportional to 138,914.10, 191,704.59 and 81,569.88 is: 112,568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,914.10 : 191,704.59 = 81,569.88 : x
  2. Step 2: Convert to fraction form
    138,914.10/191,704.59 = 81,569.88/x
  3. Step 3: Cross multiply
    138,914.10x = 191,704.59 × 81,569.88
  4. Step 4: Simplify right side
    138,914.10x = 15,637,320,401.75
  5. Step 5: Solve for x
    x = 15,637,320,401.75/138,914.10
  6. Step 6: Final answer
    x = 112,568.27

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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.