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Finding the Fourth Proportional to 122,640.82, 169,372.83 and 84,499.54

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Solution

The fourth proportional to 122,640.82, 169,372.83 and 84,499.54 is: 116,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,640.82 : 169,372.83 = 84,499.54 : x
  2. Step 2: Convert to fraction form
    122,640.82/169,372.83 = 84,499.54/x
  3. Step 3: Cross multiply
    122,640.82x = 169,372.83 × 84,499.54
  4. Step 4: Simplify right side
    122,640.82x = 14,311,926,223.50
  5. Step 5: Solve for x
    x = 14,311,926,223.50/122,640.82
  6. Step 6: Final answer
    x = 116,697.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.