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Finding the Fourth Proportional to 100,890.33, 139,226.63 and 63,185.37

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Solution

The fourth proportional to 100,890.33, 139,226.63 and 63,185.37 is: 87,194.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,890.33 : 139,226.63 = 63,185.37 : x
  2. Step 2: Convert to fraction form
    100,890.33/139,226.63 = 63,185.37/x
  3. Step 3: Cross multiply
    100,890.33x = 139,226.63 × 63,185.37
  4. Step 4: Simplify right side
    100,890.33x = 8,797,085,814.48
  5. Step 5: Solve for x
    x = 8,797,085,814.48/100,890.33
  6. Step 6: Final answer
    x = 87,194.54

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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.