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Finding the Fourth Proportional to 101,188.86, 139,634.52 and 55,865.70

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Solution

The fourth proportional to 101,188.86, 139,634.52 and 55,865.70 is: 77,091.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,188.86 : 139,634.52 = 55,865.70 : x
  2. Step 2: Convert to fraction form
    101,188.86/139,634.52 = 55,865.70/x
  3. Step 3: Cross multiply
    101,188.86x = 139,634.52 × 55,865.70
  4. Step 4: Simplify right side
    101,188.86x = 7,800,780,203.96
  5. Step 5: Solve for x
    x = 7,800,780,203.96/101,188.86
  6. Step 6: Final answer
    x = 77,091.29

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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.