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Finding the Fourth Proportional to 66,997.28, 100,490.42 and 19,608.64

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Solution

The fourth proportional to 66,997.28, 100,490.42 and 19,608.64 is: 29,411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,997.28 : 100,490.42 = 19,608.64 : x
  2. Step 2: Convert to fraction form
    66,997.28/100,490.42 = 19,608.64/x
  3. Step 3: Cross multiply
    66,997.28x = 100,490.42 × 19,608.64
  4. Step 4: Simplify right side
    66,997.28x = 1,970,480,469.23
  5. Step 5: Solve for x
    x = 1,970,480,469.23/66,997.28
  6. Step 6: Final answer
    x = 29,411.35

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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.