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Finding the Fourth Proportional to 200,020.60, 275,898.36 and 128,287

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Solution

The fourth proportional to 200,020.60, 275,898.36 and 128,287 is: 176,952.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,020.60 : 275,898.36 = 128,287 : x
  2. Step 2: Convert to fraction form
    200,020.60/275,898.36 = 128,287/x
  3. Step 3: Cross multiply
    200,020.60x = 275,898.36 × 128,287
  4. Step 4: Simplify right side
    200,020.60x = 35,394,172,909.32
  5. Step 5: Solve for x
    x = 35,394,172,909.32/200,020.60
  6. Step 6: Final answer
    x = 176,952.64

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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.