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Finding the Fourth Proportional to 85,896.52, 128,856.93 and 33,311.32

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Solution

The fourth proportional to 85,896.52, 128,856.93 and 33,311.32 is: 49,971.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,896.52 : 128,856.93 = 33,311.32 : x
  2. Step 2: Convert to fraction form
    85,896.52/128,856.93 = 33,311.32/x
  3. Step 3: Cross multiply
    85,896.52x = 128,856.93 × 33,311.32
  4. Step 4: Simplify right side
    85,896.52x = 4,292,394,429.45
  5. Step 5: Solve for x
    x = 4,292,394,429.45/85,896.52
  6. Step 6: Final answer
    x = 49,971.69

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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.