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Finding the Fourth Proportional to 66,928.56, 100,360.80 and 38,856.37

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Solution

The fourth proportional to 66,928.56, 100,360.80 and 38,856.37 is: 58,265.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,928.56 : 100,360.80 = 38,856.37 : x
  2. Step 2: Convert to fraction form
    66,928.56/100,360.80 = 38,856.37/x
  3. Step 3: Cross multiply
    66,928.56x = 100,360.80 × 38,856.37
  4. Step 4: Simplify right side
    66,928.56x = 3,899,656,378.30
  5. Step 5: Solve for x
    x = 3,899,656,378.30/66,928.56
  6. Step 6: Final answer
    x = 58,265.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.