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Finding the Fourth Proportional to 101,008.73, 139,385.49 and 55,687.09

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Solution

The fourth proportional to 101,008.73, 139,385.49 and 55,687.09 is: 76,844.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.73 : 139,385.49 = 55,687.09 : x
  2. Step 2: Convert to fraction form
    101,008.73/139,385.49 = 55,687.09/x
  3. Step 3: Cross multiply
    101,008.73x = 139,385.49 × 55,687.09
  4. Step 4: Simplify right side
    101,008.73x = 7,761,972,326.32
  5. Step 5: Solve for x
    x = 7,761,972,326.32/101,008.73
  6. Step 6: Final answer
    x = 76,844.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.