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Finding the Fourth Proportional to 66,696.75, 100,015.88 and 19,938.69

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Solution

The fourth proportional to 66,696.75, 100,015.88 and 19,938.69 is: 29,899.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,696.75 : 100,015.88 = 19,938.69 : x
  2. Step 2: Convert to fraction form
    66,696.75/100,015.88 = 19,938.69/x
  3. Step 3: Cross multiply
    66,696.75x = 100,015.88 × 19,938.69
  4. Step 4: Simplify right side
    66,696.75x = 1,994,185,526.70
  5. Step 5: Solve for x
    x = 1,994,185,526.70/66,696.75
  6. Step 6: Final answer
    x = 29,899.29

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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.