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Finding the Fourth Proportional to 72,689.94, 108,923.62 and 48,909.41

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Solution

The fourth proportional to 72,689.94, 108,923.62 and 48,909.41 is: 73,289.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,689.94 : 108,923.62 = 48,909.41 : x
  2. Step 2: Convert to fraction form
    72,689.94/108,923.62 = 48,909.41/x
  3. Step 3: Cross multiply
    72,689.94x = 108,923.62 × 48,909.41
  4. Step 4: Simplify right side
    72,689.94x = 5,327,389,414.08
  5. Step 5: Solve for x
    x = 5,327,389,414.08/72,689.94
  6. Step 6: Final answer
    x = 73,289.22

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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.