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Finding the Fourth Proportional to 101,393.91, 139,832.73 and 84,454.38

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Solution

The fourth proportional to 101,393.91, 139,832.73 and 84,454.38 is: 116,471.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,393.91 : 139,832.73 = 84,454.38 : x
  2. Step 2: Convert to fraction form
    101,393.91/139,832.73 = 84,454.38/x
  3. Step 3: Cross multiply
    101,393.91x = 139,832.73 × 84,454.38
  4. Step 4: Simplify right side
    101,393.91x = 11,809,486,515.86
  5. Step 5: Solve for x
    x = 11,809,486,515.86/101,393.91
  6. Step 6: Final answer
    x = 116,471.36

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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.