Home / 138,864.06-191,578.14-80,711.12

Finding the Fourth Proportional to 138,864.06, 191,578.14 and 80,711.12

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Solution

The fourth proportional to 138,864.06, 191,578.14 and 80,711.12 is: 111,349.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,864.06 : 191,578.14 = 80,711.12 : x
  2. Step 2: Convert to fraction form
    138,864.06/191,578.14 = 80,711.12/x
  3. Step 3: Cross multiply
    138,864.06x = 191,578.14 × 80,711.12
  4. Step 4: Simplify right side
    138,864.06x = 15,462,486,246.92
  5. Step 5: Solve for x
    x = 15,462,486,246.92/138,864.06
  6. Step 6: Final answer
    x = 111,349.81

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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.