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Finding the Fourth Proportional to 66,912, 100,170.96 and 44,670.21

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Solution

The fourth proportional to 66,912, 100,170.96 and 44,670.21 is: 66,873.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,912 : 100,170.96 = 44,670.21 : x
  2. Step 2: Convert to fraction form
    66,912/100,170.96 = 44,670.21/x
  3. Step 3: Cross multiply
    66,912x = 100,170.96 × 44,670.21
  4. Step 4: Simplify right side
    66,912x = 4,474,657,819.10
  5. Step 5: Solve for x
    x = 4,474,657,819.10/66,912
  6. Step 6: Final answer
    x = 66,873.77

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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.