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Finding the Fourth Proportional to 123,722.55, 185,583.83 and 79,435.80

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Solution

The fourth proportional to 123,722.55, 185,583.83 and 79,435.80 is: 119,153.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,722.55 : 185,583.83 = 79,435.80 : x
  2. Step 2: Convert to fraction form
    123,722.55/185,583.83 = 79,435.80/x
  3. Step 3: Cross multiply
    123,722.55x = 185,583.83 × 79,435.80
  4. Step 4: Simplify right side
    123,722.55x = 14,741,999,605.94
  5. Step 5: Solve for x
    x = 14,741,999,605.94/123,722.55
  6. Step 6: Final answer
    x = 119,153.70

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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.