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Finding the Fourth Proportional to 101,919.40, 140,626.08 and 61,632.32

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Solution

The fourth proportional to 101,919.40, 140,626.08 and 61,632.32 is: 85,038.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,919.40 : 140,626.08 = 61,632.32 : x
  2. Step 2: Convert to fraction form
    101,919.40/140,626.08 = 61,632.32/x
  3. Step 3: Cross multiply
    101,919.40x = 140,626.08 × 61,632.32
  4. Step 4: Simplify right side
    101,919.40x = 8,667,110,859.78
  5. Step 5: Solve for x
    x = 8,667,110,859.78/101,919.40
  6. Step 6: Final answer
    x = 85,038.87

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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.