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Finding the Fourth Proportional to 103,986.64, 155,990.90 and 33,871.42

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Solution

The fourth proportional to 103,986.64, 155,990.90 and 33,871.42 is: 50,810.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,986.64 : 155,990.90 = 33,871.42 : x
  2. Step 2: Convert to fraction form
    103,986.64/155,990.90 = 33,871.42/x
  3. Step 3: Cross multiply
    103,986.64x = 155,990.90 × 33,871.42
  4. Step 4: Simplify right side
    103,986.64x = 5,283,633,290.08
  5. Step 5: Solve for x
    x = 5,283,633,290.08/103,986.64
  6. Step 6: Final answer
    x = 50,810.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.