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Finding the Fourth Proportional to 139,578.51, 192,616.90 and 75,916.29

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Solution

The fourth proportional to 139,578.51, 192,616.90 and 75,916.29 is: 104,763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,578.51 : 192,616.90 = 75,916.29 : x
  2. Step 2: Convert to fraction form
    139,578.51/192,616.90 = 75,916.29/x
  3. Step 3: Cross multiply
    139,578.51x = 192,616.90 × 75,916.29
  4. Step 4: Simplify right side
    139,578.51x = 14,622,760,439.30
  5. Step 5: Solve for x
    x = 14,622,760,439.30/139,578.51
  6. Step 6: Final answer
    x = 104,763.69

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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.