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Finding the Fourth Proportional to 123,616.60, 185,619.30 and 71,128.60

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Solution

The fourth proportional to 123,616.60, 185,619.30 and 71,128.60 is: 106,804.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,616.60 : 185,619.30 = 71,128.60 : x
  2. Step 2: Convert to fraction form
    123,616.60/185,619.30 = 71,128.60/x
  3. Step 3: Cross multiply
    123,616.60x = 185,619.30 × 71,128.60
  4. Step 4: Simplify right side
    123,616.60x = 13,202,840,941.98
  5. Step 5: Solve for x
    x = 13,202,840,941.98/123,616.60
  6. Step 6: Final answer
    x = 106,804.76

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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.