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Finding the Fourth Proportional to 64,790.61, 89,414.04 and 36,112.15

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Solution

The fourth proportional to 64,790.61, 89,414.04 and 36,112.15 is: 49,836.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,790.61 : 89,414.04 = 36,112.15 : x
  2. Step 2: Convert to fraction form
    64,790.61/89,414.04 = 36,112.15/x
  3. Step 3: Cross multiply
    64,790.61x = 89,414.04 × 36,112.15
  4. Step 4: Simplify right side
    64,790.61x = 3,228,933,224.59
  5. Step 5: Solve for x
    x = 3,228,933,224.59/64,790.61
  6. Step 6: Final answer
    x = 49,836.44

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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.