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Finding the Fourth Proportional to 64,789.77, 89,412.60 and 36,109.44

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Solution

The fourth proportional to 64,789.77, 89,412.60 and 36,109.44 is: 49,832.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,789.77 : 89,412.60 = 36,109.44 : x
  2. Step 2: Convert to fraction form
    64,789.77/89,412.60 = 36,109.44/x
  3. Step 3: Cross multiply
    64,789.77x = 89,412.60 × 36,109.44
  4. Step 4: Simplify right side
    64,789.77x = 3,228,639,138.48
  5. Step 5: Solve for x
    x = 3,228,639,138.48/64,789.77
  6. Step 6: Final answer
    x = 49,832.55

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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.