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Finding the Fourth Proportional to 200,515.40, 300,773.10 and 125,865.80

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Solution

The fourth proportional to 200,515.40, 300,773.10 and 125,865.80 is: 188,798.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,515.40 : 300,773.10 = 125,865.80 : x
  2. Step 2: Convert to fraction form
    200,515.40/300,773.10 = 125,865.80/x
  3. Step 3: Cross multiply
    200,515.40x = 300,773.10 × 125,865.80
  4. Step 4: Simplify right side
    200,515.40x = 37,857,046,849.98
  5. Step 5: Solve for x
    x = 37,857,046,849.98/200,515.40
  6. Step 6: Final answer
    x = 188,798.70

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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.