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Finding the Fourth Proportional to 85,640.52, 128,372.94 and 33,029.32

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Solution

The fourth proportional to 85,640.52, 128,372.94 and 33,029.32 is: 49,510.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,640.52 : 128,372.94 = 33,029.32 : x
  2. Step 2: Convert to fraction form
    85,640.52/128,372.94 = 33,029.32/x
  3. Step 3: Cross multiply
    85,640.52x = 128,372.94 × 33,029.32
  4. Step 4: Simplify right side
    85,640.52x = 4,240,070,914.60
  5. Step 5: Solve for x
    x = 4,240,070,914.60/85,640.52
  6. Step 6: Final answer
    x = 49,510.10

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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.