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Finding the Fourth Proportional to 85,935.70, 128,910.46 and 32,653.21

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Solution

The fourth proportional to 85,935.70, 128,910.46 and 32,653.21 is: 48,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,935.70 : 128,910.46 = 32,653.21 : x
  2. Step 2: Convert to fraction form
    85,935.70/128,910.46 = 32,653.21/x
  3. Step 3: Cross multiply
    85,935.70x = 128,910.46 × 32,653.21
  4. Step 4: Simplify right side
    85,935.70x = 4,209,340,321.58
  5. Step 5: Solve for x
    x = 4,209,340,321.58/85,935.70
  6. Step 6: Final answer
    x = 48,982.44

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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.