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Finding the Fourth Proportional to 123,450.64, 170,361.56 and 66,861.84

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Solution

The fourth proportional to 123,450.64, 170,361.56 and 66,861.84 is: 92,269.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,450.64 : 170,361.56 = 66,861.84 : x
  2. Step 2: Convert to fraction form
    123,450.64/170,361.56 = 66,861.84/x
  3. Step 3: Cross multiply
    123,450.64x = 170,361.56 × 66,861.84
  4. Step 4: Simplify right side
    123,450.64x = 11,390,687,366.87
  5. Step 5: Solve for x
    x = 11,390,687,366.87/123,450.64
  6. Step 6: Final answer
    x = 92,269.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.