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Finding the Fourth Proportional to 85,659.46, 128,415.36 and 33,105.82

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Solution

The fourth proportional to 85,659.46, 128,415.36 and 33,105.82 is: 49,630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,659.46 : 128,415.36 = 33,105.82 : x
  2. Step 2: Convert to fraction form
    85,659.46/128,415.36 = 33,105.82/x
  3. Step 3: Cross multiply
    85,659.46x = 128,415.36 × 33,105.82
  4. Step 4: Simplify right side
    85,659.46x = 4,251,295,793.40
  5. Step 5: Solve for x
    x = 4,251,295,793.40/85,659.46
  6. Step 6: Final answer
    x = 49,630.20

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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.