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Finding the Fourth Proportional to 128,569.59, 192,809.16 and 38,585.43

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Solution

The fourth proportional to 128,569.59, 192,809.16 and 38,585.43 is: 57,864.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569.59 : 192,809.16 = 38,585.43 : x
  2. Step 2: Convert to fraction form
    128,569.59/192,809.16 = 38,585.43/x
  3. Step 3: Cross multiply
    128,569.59x = 192,809.16 × 38,585.43
  4. Step 4: Simplify right side
    128,569.59x = 7,439,624,346.54
  5. Step 5: Solve for x
    x = 7,439,624,346.54/128,569.59
  6. Step 6: Final answer
    x = 57,864.57

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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.