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Finding the Fourth Proportional to 200,021.22, 275,899.23 and 128,287.62

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Solution

The fourth proportional to 200,021.22, 275,899.23 and 128,287.62 is: 176,953.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,021.22 : 275,899.23 = 128,287.62 : x
  2. Step 2: Convert to fraction form
    200,021.22/275,899.23 = 128,287.62/x
  3. Step 3: Cross multiply
    200,021.22x = 275,899.23 × 128,287.62
  4. Step 4: Simplify right side
    200,021.22x = 35,394,455,576.53
  5. Step 5: Solve for x
    x = 35,394,455,576.53/200,021.22
  6. Step 6: Final answer
    x = 176,953.50

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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.