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Finding the Fourth Proportional to 65,288.73, 89,511.68 and 64,107.75

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Solution

The fourth proportional to 65,288.73, 89,511.68 and 64,107.75 is: 87,892.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,288.73 : 89,511.68 = 64,107.75 : x
  2. Step 2: Convert to fraction form
    65,288.73/89,511.68 = 64,107.75/x
  3. Step 3: Cross multiply
    65,288.73x = 89,511.68 × 64,107.75
  4. Step 4: Simplify right side
    65,288.73x = 5,738,392,899.46
  5. Step 5: Solve for x
    x = 5,738,392,899.46/65,288.73
  6. Step 6: Final answer
    x = 87,892.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.