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Finding the Fourth Proportional to 64,979.64, 89,671.92 and 36,687.15

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Solution

The fourth proportional to 64,979.64, 89,671.92 and 36,687.15 is: 50,628.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,979.64 : 89,671.92 = 36,687.15 : x
  2. Step 2: Convert to fraction form
    64,979.64/89,671.92 = 36,687.15/x
  3. Step 3: Cross multiply
    64,979.64x = 89,671.92 × 36,687.15
  4. Step 4: Simplify right side
    64,979.64x = 3,289,807,179.83
  5. Step 5: Solve for x
    x = 3,289,807,179.83/64,979.64
  6. Step 6: Final answer
    x = 50,628.28

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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.