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Finding the Fourth Proportional to 66,657.75, 99,990.27 and 19,914.27

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Solution

The fourth proportional to 66,657.75, 99,990.27 and 19,914.27 is: 29,872.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,657.75 : 99,990.27 = 19,914.27 : x
  2. Step 2: Convert to fraction form
    66,657.75/99,990.27 = 19,914.27/x
  3. Step 3: Cross multiply
    66,657.75x = 99,990.27 × 19,914.27
  4. Step 4: Simplify right side
    66,657.75x = 1,991,233,234.15
  5. Step 5: Solve for x
    x = 1,991,233,234.15/66,657.75
  6. Step 6: Final answer
    x = 29,872.49

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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.