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Finding the Fourth Proportional to 139,191.51, 192,073.73 and 81,833.19

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Solution

The fourth proportional to 139,191.51, 192,073.73 and 81,833.19 is: 112,923.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,191.51 : 192,073.73 = 81,833.19 : x
  2. Step 2: Convert to fraction form
    139,191.51/192,073.73 = 81,833.19/x
  3. Step 3: Cross multiply
    139,191.51x = 192,073.73 × 81,833.19
  4. Step 4: Simplify right side
    139,191.51x = 15,718,005,371.97
  5. Step 5: Solve for x
    x = 15,718,005,371.97/139,191.51
  6. Step 6: Final answer
    x = 112,923.59

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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.