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Finding the Fourth Proportional to 198,234.63, 273,261.87 and 121,611.87

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Solution

The fourth proportional to 198,234.63, 273,261.87 and 121,611.87 is: 167,639.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,234.63 : 273,261.87 = 121,611.87 : x
  2. Step 2: Convert to fraction form
    198,234.63/273,261.87 = 121,611.87/x
  3. Step 3: Cross multiply
    198,234.63x = 273,261.87 × 121,611.87
  4. Step 4: Simplify right side
    198,234.63x = 33,231,887,010.40
  5. Step 5: Solve for x
    x = 33,231,887,010.40/198,234.63
  6. Step 6: Final answer
    x = 167,639.16

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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.