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Finding the Fourth Proportional to 203,422.60, 305,129.10 and 55,678.60

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Solution

The fourth proportional to 203,422.60, 305,129.10 and 55,678.60 is: 83,516.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,422.60 : 305,129.10 = 55,678.60 : x
  2. Step 2: Convert to fraction form
    203,422.60/305,129.10 = 55,678.60/x
  3. Step 3: Cross multiply
    203,422.60x = 305,129.10 × 55,678.60
  4. Step 4: Simplify right side
    203,422.60x = 16,989,161,107.26
  5. Step 5: Solve for x
    x = 16,989,161,107.26/203,422.60
  6. Step 6: Final answer
    x = 83,516.59

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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.