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Finding the Fourth Proportional to 218,721.74, 301,820.63 and 120,600.61

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Solution

The fourth proportional to 218,721.74, 301,820.63 and 120,600.61 is: 166,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,721.74 : 301,820.63 = 120,600.61 : x
  2. Step 2: Convert to fraction form
    218,721.74/301,820.63 = 120,600.61/x
  3. Step 3: Cross multiply
    218,721.74x = 301,820.63 × 120,600.61
  4. Step 4: Simplify right side
    218,721.74x = 36,399,753,107.15
  5. Step 5: Solve for x
    x = 36,399,753,107.15/218,721.74
  6. Step 6: Final answer
    x = 166,420.37

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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.