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Finding the Fourth Proportional to 220,670.40, 331,142.40 and 115,564.80

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Solution

The fourth proportional to 220,670.40, 331,142.40 and 115,564.80 is: 173,418.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,670.40 : 331,142.40 = 115,564.80 : x
  2. Step 2: Convert to fraction form
    220,670.40/331,142.40 = 115,564.80/x
  3. Step 3: Cross multiply
    220,670.40x = 331,142.40 × 115,564.80
  4. Step 4: Simplify right side
    220,670.40x = 38,268,405,227.52
  5. Step 5: Solve for x
    x = 38,268,405,227.52/220,670.40
  6. Step 6: Final answer
    x = 173,418.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.