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Finding the Fourth Proportional to 72,629.52, 108,951.36 and 28,259.88

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Solution

The fourth proportional to 72,629.52, 108,951.36 and 28,259.88 is: 42,392.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.52 : 108,951.36 = 28,259.88 : x
  2. Step 2: Convert to fraction form
    72,629.52/108,951.36 = 28,259.88/x
  3. Step 3: Cross multiply
    72,629.52x = 108,951.36 × 28,259.88
  4. Step 4: Simplify right side
    72,629.52x = 3,078,952,359.44
  5. Step 5: Solve for x
    x = 3,078,952,359.44/72,629.52
  6. Step 6: Final answer
    x = 42,392.57

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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.