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Finding the Fourth Proportional to 85,615.76, 128,449.08 and 41,229.68

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Solution

The fourth proportional to 85,615.76, 128,449.08 and 41,229.68 is: 61,856.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.76 : 128,449.08 = 41,229.68 : x
  2. Step 2: Convert to fraction form
    85,615.76/128,449.08 = 41,229.68/x
  3. Step 3: Cross multiply
    85,615.76x = 128,449.08 × 41,229.68
  4. Step 4: Simplify right side
    85,615.76x = 5,295,914,464.69
  5. Step 5: Solve for x
    x = 5,295,914,464.69/85,615.76
  6. Step 6: Final answer
    x = 61,856.77

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1.5x scale

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.