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Finding the Fourth Proportional to 85,239.97, 127,896.89 and 45,750.94

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Solution

The fourth proportional to 85,239.97, 127,896.89 and 45,750.94 is: 68,646.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,239.97 : 127,896.89 = 45,750.94 : x
  2. Step 2: Convert to fraction form
    85,239.97/127,896.89 = 45,750.94/x
  3. Step 3: Cross multiply
    85,239.97x = 127,896.89 × 45,750.94
  4. Step 4: Simplify right side
    85,239.97x = 5,851,402,392.08
  5. Step 5: Solve for x
    x = 5,851,402,392.08/85,239.97
  6. Step 6: Final answer
    x = 68,646.23

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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.