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Finding the Fourth Proportional to 72,963.72, 109,494.78 and 28,584.90

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Solution

The fourth proportional to 72,963.72, 109,494.78 and 28,584.90 is: 42,896.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,963.72 : 109,494.78 = 28,584.90 : x
  2. Step 2: Convert to fraction form
    72,963.72/109,494.78 = 28,584.90/x
  3. Step 3: Cross multiply
    72,963.72x = 109,494.78 × 28,584.90
  4. Step 4: Simplify right side
    72,963.72x = 3,129,897,336.82
  5. Step 5: Solve for x
    x = 3,129,897,336.82/72,963.72
  6. Step 6: Final answer
    x = 42,896.63

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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.