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Finding the Fourth Proportional to 72,571.80, 108,855.24 and 28,208.52

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Solution

The fourth proportional to 72,571.80, 108,855.24 and 28,208.52 is: 42,311.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.80 : 108,855.24 = 28,208.52 : x
  2. Step 2: Convert to fraction form
    72,571.80/108,855.24 = 28,208.52/x
  3. Step 3: Cross multiply
    72,571.80x = 108,855.24 × 28,208.52
  4. Step 4: Simplify right side
    72,571.80x = 3,070,645,214.64
  5. Step 5: Solve for x
    x = 3,070,645,214.64/72,571.80
  6. Step 6: Final answer
    x = 42,311.82

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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.