Home / 305,138.34-421,104.18-169,163.64

Finding the Fourth Proportional to 305,138.34, 421,104.18 and 169,163.64

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Solution

The fourth proportional to 305,138.34, 421,104.18 and 169,163.64 is: 233,453.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,138.34 : 421,104.18 = 169,163.64 : x
  2. Step 2: Convert to fraction form
    305,138.34/421,104.18 = 169,163.64/x
  3. Step 3: Cross multiply
    305,138.34x = 421,104.18 × 169,163.64
  4. Step 4: Simplify right side
    305,138.34x = 71,235,515,908.02
  5. Step 5: Solve for x
    x = 71,235,515,908.02/305,138.34
  6. Step 6: Final answer
    x = 233,453.18

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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.