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Finding the Fourth Proportional to 72,939.20, 109,299.44 and 56,274.32

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Solution

The fourth proportional to 72,939.20, 109,299.44 and 56,274.32 is: 84,327.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.20 : 109,299.44 = 56,274.32 : x
  2. Step 2: Convert to fraction form
    72,939.20/109,299.44 = 56,274.32/x
  3. Step 3: Cross multiply
    72,939.20x = 109,299.44 × 56,274.32
  4. Step 4: Simplify right side
    72,939.20x = 6,150,751,662.38
  5. Step 5: Solve for x
    x = 6,150,751,662.38/72,939.20
  6. Step 6: Final answer
    x = 84,327.11

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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.