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Finding the Fourth Proportional to 101,790.91, 140,379.43 and 63,553.91

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Solution

The fourth proportional to 101,790.91, 140,379.43 and 63,553.91 is: 87,646.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,790.91 : 140,379.43 = 63,553.91 : x
  2. Step 2: Convert to fraction form
    101,790.91/140,379.43 = 63,553.91/x
  3. Step 3: Cross multiply
    101,790.91x = 140,379.43 × 63,553.91
  4. Step 4: Simplify right side
    101,790.91x = 8,921,661,342.30
  5. Step 5: Solve for x
    x = 8,921,661,342.30/101,790.91
  6. Step 6: Final answer
    x = 87,646.94

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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.