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Finding the Fourth Proportional to 101,227.65, 139,695.21 and 55,906.78

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Solution

The fourth proportional to 101,227.65, 139,695.21 and 55,906.78 is: 77,151.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,227.65 : 139,695.21 = 55,906.78 : x
  2. Step 2: Convert to fraction form
    101,227.65/139,695.21 = 55,906.78/x
  3. Step 3: Cross multiply
    101,227.65x = 139,695.21 × 55,906.78
  4. Step 4: Simplify right side
    101,227.65x = 7,809,909,372.52
  5. Step 5: Solve for x
    x = 7,809,909,372.52/101,227.65
  6. Step 6: Final answer
    x = 77,151.94

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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.