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Finding the Fourth Proportional to 201,021.20, 301,531.80 and 51,261.20

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Solution

The fourth proportional to 201,021.20, 301,531.80 and 51,261.20 is: 76,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,021.20 : 301,531.80 = 51,261.20 : x
  2. Step 2: Convert to fraction form
    201,021.20/301,531.80 = 51,261.20/x
  3. Step 3: Cross multiply
    201,021.20x = 301,531.80 × 51,261.20
  4. Step 4: Simplify right side
    201,021.20x = 15,456,881,906.16
  5. Step 5: Solve for x
    x = 15,456,881,906.16/201,021.20
  6. Step 6: Final answer
    x = 76,891.80

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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.