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Finding the Fourth Proportional to 200,017.91, 275,894.66 and 128,284.31

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Solution

The fourth proportional to 200,017.91, 275,894.66 and 128,284.31 is: 176,948.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,017.91 : 275,894.66 = 128,284.31 : x
  2. Step 2: Convert to fraction form
    200,017.91/275,894.66 = 128,284.31/x
  3. Step 3: Cross multiply
    200,017.91x = 275,894.66 × 128,284.31
  4. Step 4: Simplify right side
    200,017.91x = 35,392,956,090.78
  5. Step 5: Solve for x
    x = 35,392,956,090.78/200,017.91
  6. Step 6: Final answer
    x = 176,948.93

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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.