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Finding the Fourth Proportional to 64,218.60, 88,624.44 and 39,694.86

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Solution

The fourth proportional to 64,218.60, 88,624.44 and 39,694.86 is: 54,780.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,218.60 : 88,624.44 = 39,694.86 : x
  2. Step 2: Convert to fraction form
    64,218.60/88,624.44 = 39,694.86/x
  3. Step 3: Cross multiply
    64,218.60x = 88,624.44 × 39,694.86
  4. Step 4: Simplify right side
    64,218.60x = 3,517,934,738.38
  5. Step 5: Solve for x
    x = 3,517,934,738.38/64,218.60
  6. Step 6: Final answer
    x = 54,780.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.