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Finding the Fourth Proportional to 66,641.28, 99,961.84 and 17,393.28

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Solution

The fourth proportional to 66,641.28, 99,961.84 and 17,393.28 is: 26,089.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,641.28 : 99,961.84 = 17,393.28 : x
  2. Step 2: Convert to fraction form
    66,641.28/99,961.84 = 17,393.28/x
  3. Step 3: Cross multiply
    66,641.28x = 99,961.84 × 17,393.28
  4. Step 4: Simplify right side
    66,641.28x = 1,738,664,272.44
  5. Step 5: Solve for x
    x = 1,738,664,272.44/66,641.28
  6. Step 6: Final answer
    x = 26,089.90

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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.