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Finding the Fourth Proportional to 72,611.85, 108,924.50 and 28,241.94

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Solution

The fourth proportional to 72,611.85, 108,924.50 and 28,241.94 is: 42,365.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,611.85 : 108,924.50 = 28,241.94 : x
  2. Step 2: Convert to fraction form
    72,611.85/108,924.50 = 28,241.94/x
  3. Step 3: Cross multiply
    72,611.85x = 108,924.50 × 28,241.94
  4. Step 4: Simplify right side
    72,611.85x = 3,076,239,193.53
  5. Step 5: Solve for x
    x = 3,076,239,193.53/72,611.85
  6. Step 6: Final answer
    x = 42,365.53

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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.