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Finding the Fourth Proportional to 84,614.63, 126,928.33 and 28,454.90

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Solution

The fourth proportional to 84,614.63, 126,928.33 and 28,454.90 is: 42,684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,614.63 : 126,928.33 = 28,454.90 : x
  2. Step 2: Convert to fraction form
    84,614.63/126,928.33 = 28,454.90/x
  3. Step 3: Cross multiply
    84,614.63x = 126,928.33 × 28,454.90
  4. Step 4: Simplify right side
    84,614.63x = 3,611,733,183.50
  5. Step 5: Solve for x
    x = 3,611,733,183.50/84,614.63
  6. Step 6: Final answer
    x = 42,684.50

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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.