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Finding the Fourth Proportional to 72,385.80, 108,611.10 and 32,922.60

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Solution

The fourth proportional to 72,385.80, 108,611.10 and 32,922.60 is: 49,398.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,385.80 : 108,611.10 = 32,922.60 : x
  2. Step 2: Convert to fraction form
    72,385.80/108,611.10 = 32,922.60/x
  3. Step 3: Cross multiply
    72,385.80x = 108,611.10 × 32,922.60
  4. Step 4: Simplify right side
    72,385.80x = 3,575,759,800.86
  5. Step 5: Solve for x
    x = 3,575,759,800.86/72,385.80
  6. Step 6: Final answer
    x = 49,398.64

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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.