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Finding the Fourth Proportional to 66,684.60, 100,039.86 and 19,936.44

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Solution

The fourth proportional to 66,684.60, 100,039.86 and 19,936.44 is: 29,908.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,684.60 : 100,039.86 = 19,936.44 : x
  2. Step 2: Convert to fraction form
    66,684.60/100,039.86 = 19,936.44/x
  3. Step 3: Cross multiply
    66,684.60x = 100,039.86 × 19,936.44
  4. Step 4: Simplify right side
    66,684.60x = 1,994,438,666.50
  5. Step 5: Solve for x
    x = 1,994,438,666.50/66,684.60
  6. Step 6: Final answer
    x = 29,908.53

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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.