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Finding the Fourth Proportional to 128,532.05, 192,806.24 and 39,778.10

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Solution

The fourth proportional to 128,532.05, 192,806.24 and 39,778.10 is: 59,669.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,532.05 : 192,806.24 = 39,778.10 : x
  2. Step 2: Convert to fraction form
    128,532.05/192,806.24 = 39,778.10/x
  3. Step 3: Cross multiply
    128,532.05x = 192,806.24 × 39,778.10
  4. Step 4: Simplify right side
    128,532.05x = 7,669,465,895.34
  5. Step 5: Solve for x
    x = 7,669,465,895.34/128,532.05
  6. Step 6: Final answer
    x = 59,669.68

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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.