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Finding the Fourth Proportional to 123,438.56, 170,344.86 and 66,849.80

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Solution

The fourth proportional to 123,438.56, 170,344.86 and 66,849.80 is: 92,252.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,438.56 : 170,344.86 = 66,849.80 : x
  2. Step 2: Convert to fraction form
    123,438.56/170,344.86 = 66,849.80/x
  3. Step 3: Cross multiply
    123,438.56x = 170,344.86 × 66,849.80
  4. Step 4: Simplify right side
    123,438.56x = 11,387,519,822.03
  5. Step 5: Solve for x
    x = 11,387,519,822.03/123,438.56
  6. Step 6: Final answer
    x = 92,252.53

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1.5x scale

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.