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Finding the Fourth Proportional to 101,919.77, 140,626.63 and 61,632.68

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Solution

The fourth proportional to 101,919.77, 140,626.63 and 61,632.68 is: 85,039.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,919.77 : 140,626.63 = 61,632.68 : x
  2. Step 2: Convert to fraction form
    101,919.77/140,626.63 = 61,632.68/x
  3. Step 3: Cross multiply
    101,919.77x = 140,626.63 × 61,632.68
  4. Step 4: Simplify right side
    101,919.77x = 8,667,196,283.75
  5. Step 5: Solve for x
    x = 8,667,196,283.75/101,919.77
  6. Step 6: Final answer
    x = 85,039.41

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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.