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Finding the Fourth Proportional to 66,939.26, 100,411.52 and 20,192.13

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Solution

The fourth proportional to 66,939.26, 100,411.52 and 20,192.13 is: 30,288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,939.26 : 100,411.52 = 20,192.13 : x
  2. Step 2: Convert to fraction form
    66,939.26/100,411.52 = 20,192.13/x
  3. Step 3: Cross multiply
    66,939.26x = 100,411.52 × 20,192.13
  4. Step 4: Simplify right side
    66,939.26x = 2,027,522,364.38
  5. Step 5: Solve for x
    x = 2,027,522,364.38/66,939.26
  6. Step 6: Final answer
    x = 30,288.99

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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.