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Finding the Fourth Proportional to 66,907.39, 100,361.13 and 16,991.23

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Solution

The fourth proportional to 66,907.39, 100,361.13 and 16,991.23 is: 25,486.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,907.39 : 100,361.13 = 16,991.23 : x
  2. Step 2: Convert to fraction form
    66,907.39/100,361.13 = 16,991.23/x
  3. Step 3: Cross multiply
    66,907.39x = 100,361.13 × 16,991.23
  4. Step 4: Simplify right side
    66,907.39x = 1,705,259,042.89
  5. Step 5: Solve for x
    x = 1,705,259,042.89/66,907.39
  6. Step 6: Final answer
    x = 25,486.86

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1.5x scale

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.