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Finding the Fourth Proportional to 200,021.80, 299,802.30 and 81,634.60

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Solution

The fourth proportional to 200,021.80, 299,802.30 and 81,634.60 is: 122,357.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,021.80 : 299,802.30 = 81,634.60 : x
  2. Step 2: Convert to fraction form
    200,021.80/299,802.30 = 81,634.60/x
  3. Step 3: Cross multiply
    200,021.80x = 299,802.30 × 81,634.60
  4. Step 4: Simplify right side
    200,021.80x = 24,474,240,839.58
  5. Step 5: Solve for x
    x = 24,474,240,839.58/200,021.80
  6. Step 6: Final answer
    x = 122,357.87

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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.