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Finding the Fourth Proportional to 72,571.98, 108,829.98 and 28,192.90

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Solution

The fourth proportional to 72,571.98, 108,829.98 and 28,192.90 is: 42,278.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.98 : 108,829.98 = 28,192.90 : x
  2. Step 2: Convert to fraction form
    72,571.98/108,829.98 = 28,192.90/x
  3. Step 3: Cross multiply
    72,571.98x = 108,829.98 × 28,192.90
  4. Step 4: Simplify right side
    72,571.98x = 3,068,232,743.14
  5. Step 5: Solve for x
    x = 3,068,232,743.14/72,571.98
  6. Step 6: Final answer
    x = 42,278.48

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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.