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Finding the Fourth Proportional to 218,129.80, 301,004.20 and 122,651.32

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Solution

The fourth proportional to 218,129.80, 301,004.20 and 122,651.32 is: 169,250.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,129.80 : 301,004.20 = 122,651.32 : x
  2. Step 2: Convert to fraction form
    218,129.80/301,004.20 = 122,651.32/x
  3. Step 3: Cross multiply
    218,129.80x = 301,004.20 × 122,651.32
  4. Step 4: Simplify right side
    218,129.80x = 36,918,562,455.54
  5. Step 5: Solve for x
    x = 36,918,562,455.54/218,129.80
  6. Step 6: Final answer
    x = 169,250.43

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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.