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Finding the Fourth Proportional to 123,286.60, 184,821.90 and 83,715.40

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Solution

The fourth proportional to 123,286.60, 184,821.90 and 83,715.40 is: 125,499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,286.60 : 184,821.90 = 83,715.40 : x
  2. Step 2: Convert to fraction form
    123,286.60/184,821.90 = 83,715.40/x
  3. Step 3: Cross multiply
    123,286.60x = 184,821.90 × 83,715.40
  4. Step 4: Simplify right side
    123,286.60x = 15,472,439,287.26
  5. Step 5: Solve for x
    x = 15,472,439,287.26/123,286.60
  6. Step 6: Final answer
    x = 125,499.76

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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.