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Finding the Fourth Proportional to 123,619.80, 185,487.30 and 92,515.80

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Solution

The fourth proportional to 123,619.80, 185,487.30 and 92,515.80 is: 138,816.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,619.80 : 185,487.30 = 92,515.80 : x
  2. Step 2: Convert to fraction form
    123,619.80/185,487.30 = 92,515.80/x
  3. Step 3: Cross multiply
    123,619.80x = 185,487.30 × 92,515.80
  4. Step 4: Simplify right side
    123,619.80x = 17,160,505,949.34
  5. Step 5: Solve for x
    x = 17,160,505,949.34/123,619.80
  6. Step 6: Final answer
    x = 138,816.81

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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.