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Finding the Fourth Proportional to 218,015.36, 300,888.08 and 122,520

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Solution

The fourth proportional to 218,015.36, 300,888.08 and 122,520 is: 169,092.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,015.36 : 300,888.08 = 122,520 : x
  2. Step 2: Convert to fraction form
    218,015.36/300,888.08 = 122,520/x
  3. Step 3: Cross multiply
    218,015.36x = 300,888.08 × 122,520
  4. Step 4: Simplify right side
    218,015.36x = 36,864,807,561.60
  5. Step 5: Solve for x
    x = 36,864,807,561.60/218,015.36
  6. Step 6: Final answer
    x = 169,092.71

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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.