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Finding the Fourth Proportional to 72,893.28, 100,558.34 and 42,659.88

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Solution

The fourth proportional to 72,893.28, 100,558.34 and 42,659.88 is: 58,850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,893.28 : 100,558.34 = 42,659.88 : x
  2. Step 2: Convert to fraction form
    72,893.28/100,558.34 = 42,659.88/x
  3. Step 3: Cross multiply
    72,893.28x = 100,558.34 × 42,659.88
  4. Step 4: Simplify right side
    72,893.28x = 4,289,806,286.98
  5. Step 5: Solve for x
    x = 4,289,806,286.98/72,893.28
  6. Step 6: Final answer
    x = 58,850.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.