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Finding the Fourth Proportional to 101,169.86, 139,622.13 and 55,856.57

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Solution

The fourth proportional to 101,169.86, 139,622.13 and 55,856.57 is: 77,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,169.86 : 139,622.13 = 55,856.57 : x
  2. Step 2: Convert to fraction form
    101,169.86/139,622.13 = 55,856.57/x
  3. Step 3: Cross multiply
    101,169.86x = 139,622.13 × 55,856.57
  4. Step 4: Simplify right side
    101,169.86x = 7,798,812,579.78
  5. Step 5: Solve for x
    x = 7,798,812,579.78/101,169.86
  6. Step 6: Final answer
    x = 77,086.33

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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.