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Finding the Fourth Proportional to 85,365.97, 127,938.22 and 57,243.88

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Solution

The fourth proportional to 85,365.97, 127,938.22 and 57,243.88 is: 85,791.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,365.97 : 127,938.22 = 57,243.88 : x
  2. Step 2: Convert to fraction form
    85,365.97/127,938.22 = 57,243.88/x
  3. Step 3: Cross multiply
    85,365.97x = 127,938.22 × 57,243.88
  4. Step 4: Simplify right side
    85,365.97x = 7,323,680,113.09
  5. Step 5: Solve for x
    x = 7,323,680,113.09/85,365.97
  6. Step 6: Final answer
    x = 85,791.56

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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.