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Finding the Fourth Proportional to 122,165.20, 183,247.80 and 92,640.70

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Solution

The fourth proportional to 122,165.20, 183,247.80 and 92,640.70 is: 138,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,165.20 : 183,247.80 = 92,640.70 : x
  2. Step 2: Convert to fraction form
    122,165.20/183,247.80 = 92,640.70/x
  3. Step 3: Cross multiply
    122,165.20x = 183,247.80 × 92,640.70
  4. Step 4: Simplify right side
    122,165.20x = 16,976,204,465.46
  5. Step 5: Solve for x
    x = 16,976,204,465.46/122,165.20
  6. Step 6: Final answer
    x = 138,961.05

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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.