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Finding the Fourth Proportional to 88,721.94, 133,086 and 28,749

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Solution

The fourth proportional to 88,721.94, 133,086 and 28,749 is: 43,124.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,721.94 : 133,086 = 28,749 : x
  2. Step 2: Convert to fraction form
    88,721.94/133,086 = 28,749/x
  3. Step 3: Cross multiply
    88,721.94x = 133,086 × 28,749
  4. Step 4: Simplify right side
    88,721.94x = 3,826,089,414
  5. Step 5: Solve for x
    x = 3,826,089,414/88,721.94
  6. Step 6: Final answer
    x = 43,124.50

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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.