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Finding the Fourth Proportional to 128,809.92, 193,215.39 and 53,877.51

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Solution

The fourth proportional to 128,809.92, 193,215.39 and 53,877.51 is: 80,816.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,809.92 : 193,215.39 = 53,877.51 : x
  2. Step 2: Convert to fraction form
    128,809.92/193,215.39 = 53,877.51/x
  3. Step 3: Cross multiply
    128,809.92x = 193,215.39 × 53,877.51
  4. Step 4: Simplify right side
    128,809.92x = 10,409,964,106.88
  5. Step 5: Solve for x
    x = 10,409,964,106.88/128,809.92
  6. Step 6: Final answer
    x = 80,816.48

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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.