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Finding the Fourth Proportional to 218,110.53, 300,989.60 and 122,617.20

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Solution

The fourth proportional to 218,110.53, 300,989.60 and 122,617.20 is: 169,210.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,110.53 : 300,989.60 = 122,617.20 : x
  2. Step 2: Convert to fraction form
    218,110.53/300,989.60 = 122,617.20/x
  3. Step 3: Cross multiply
    218,110.53x = 300,989.60 × 122,617.20
  4. Step 4: Simplify right side
    218,110.53x = 36,906,502,956.56
  5. Step 5: Solve for x
    x = 36,906,502,956.56/218,110.53
  6. Step 6: Final answer
    x = 169,210.09

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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.