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Finding the Fourth Proportional to 66,932.51, 100,415.43 and 20,185.38

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Solution

The fourth proportional to 66,932.51, 100,415.43 and 20,185.38 is: 30,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,932.51 : 100,415.43 = 20,185.38 : x
  2. Step 2: Convert to fraction form
    66,932.51/100,415.43 = 20,185.38/x
  3. Step 3: Cross multiply
    66,932.51x = 100,415.43 × 20,185.38
  4. Step 4: Simplify right side
    66,932.51x = 2,026,923,612.41
  5. Step 5: Solve for x
    x = 2,026,923,612.41/66,932.51
  6. Step 6: Final answer
    x = 30,283.10

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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.