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Finding the Fourth Proportional to 230,662.40, 345,928.80 and 72,939.20

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Solution

The fourth proportional to 230,662.40, 345,928.80 and 72,939.20 is: 109,388.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,662.40 : 345,928.80 = 72,939.20 : x
  2. Step 2: Convert to fraction form
    230,662.40/345,928.80 = 72,939.20/x
  3. Step 3: Cross multiply
    230,662.40x = 345,928.80 × 72,939.20
  4. Step 4: Simplify right side
    230,662.40x = 25,231,769,928.96
  5. Step 5: Solve for x
    x = 25,231,769,928.96/230,662.40
  6. Step 6: Final answer
    x = 109,388.31

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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.