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Finding the Fourth Proportional to 128,557.62, 192,866.40 and 39,806.37

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Solution

The fourth proportional to 128,557.62, 192,866.40 and 39,806.37 is: 59,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,557.62 : 192,866.40 = 39,806.37 : x
  2. Step 2: Convert to fraction form
    128,557.62/192,866.40 = 39,806.37/x
  3. Step 3: Cross multiply
    128,557.62x = 192,866.40 × 39,806.37
  4. Step 4: Simplify right side
    128,557.62x = 7,677,311,278.97
  5. Step 5: Solve for x
    x = 7,677,311,278.97/128,557.62
  6. Step 6: Final answer
    x = 59,718.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.