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Finding the Fourth Proportional to 123,568.43, 170,519.87 and 66,978.59

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Solution

The fourth proportional to 123,568.43, 170,519.87 and 66,978.59 is: 92,427.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,568.43 : 170,519.87 = 66,978.59 : x
  2. Step 2: Convert to fraction form
    123,568.43/170,519.87 = 66,978.59/x
  3. Step 3: Cross multiply
    123,568.43x = 170,519.87 × 66,978.59
  4. Step 4: Simplify right side
    123,568.43x = 11,421,180,124.69
  5. Step 5: Solve for x
    x = 11,421,180,124.69/123,568.43
  6. Step 6: Final answer
    x = 92,427.98

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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.