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Finding the Fourth Proportional to 72,611.49, 108,923.95 and 28,241.61

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Solution

The fourth proportional to 72,611.49, 108,923.95 and 28,241.61 is: 42,365.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,611.49 : 108,923.95 = 28,241.61 : x
  2. Step 2: Convert to fraction form
    72,611.49/108,923.95 = 28,241.61/x
  3. Step 3: Cross multiply
    72,611.49x = 108,923.95 × 28,241.61
  4. Step 4: Simplify right side
    72,611.49x = 3,076,187,715.56
  5. Step 5: Solve for x
    x = 3,076,187,715.56/72,611.49
  6. Step 6: Final answer
    x = 42,365.03

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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.