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Finding the Fourth Proportional to 172,776.80, 258,873.60 and 83,838.80

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Solution

The fourth proportional to 172,776.80, 258,873.60 and 83,838.80 is: 125,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,776.80 : 258,873.60 = 83,838.80 : x
  2. Step 2: Convert to fraction form
    172,776.80/258,873.60 = 83,838.80/x
  3. Step 3: Cross multiply
    172,776.80x = 258,873.60 × 83,838.80
  4. Step 4: Simplify right side
    172,776.80x = 21,703,651,975.68
  5. Step 5: Solve for x
    x = 21,703,651,975.68/172,776.80
  6. Step 6: Final answer
    x = 125,616.70

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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.