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Finding the Fourth Proportional to 72,639.44, 108,893.40 and 50,463.20

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Solution

The fourth proportional to 72,639.44, 108,893.40 and 50,463.20 is: 75,649.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,639.44 : 108,893.40 = 50,463.20 : x
  2. Step 2: Convert to fraction form
    72,639.44/108,893.40 = 50,463.20/x
  3. Step 3: Cross multiply
    72,639.44x = 108,893.40 × 50,463.20
  4. Step 4: Simplify right side
    72,639.44x = 5,495,109,422.88
  5. Step 5: Solve for x
    x = 5,495,109,422.88/72,639.44
  6. Step 6: Final answer
    x = 75,649.12

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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.