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Finding the Fourth Proportional to 123,489.72, 170,414.74 and 66,900.96

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Solution

The fourth proportional to 123,489.72, 170,414.74 and 66,900.96 is: 92,322.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,489.72 : 170,414.74 = 66,900.96 : x
  2. Step 2: Convert to fraction form
    123,489.72/170,414.74 = 66,900.96/x
  3. Step 3: Cross multiply
    123,489.72x = 170,414.74 × 66,900.96
  4. Step 4: Simplify right side
    123,489.72x = 11,400,908,684.82
  5. Step 5: Solve for x
    x = 11,400,908,684.82/123,489.72
  6. Step 6: Final answer
    x = 92,322.74

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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.