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Finding the Fourth Proportional to 129,551.92, 178,794.40 and 75,833.68

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Solution

The fourth proportional to 129,551.92, 178,794.40 and 75,833.68 is: 104,657.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,551.92 : 178,794.40 = 75,833.68 : x
  2. Step 2: Convert to fraction form
    129,551.92/178,794.40 = 75,833.68/x
  3. Step 3: Cross multiply
    129,551.92x = 178,794.40 × 75,833.68
  4. Step 4: Simplify right side
    129,551.92x = 13,558,637,315.39
  5. Step 5: Solve for x
    x = 13,558,637,315.39/129,551.92
  6. Step 6: Final answer
    x = 104,657.94

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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.