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Finding the Fourth Proportional to 100,908.60, 151,370.10 and 30,787.80

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Solution

The fourth proportional to 100,908.60, 151,370.10 and 30,787.80 is: 46,183.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.60 : 151,370.10 = 30,787.80 : x
  2. Step 2: Convert to fraction form
    100,908.60/151,370.10 = 30,787.80/x
  3. Step 3: Cross multiply
    100,908.60x = 151,370.10 × 30,787.80
  4. Step 4: Simplify right side
    100,908.60x = 4,660,352,364.78
  5. Step 5: Solve for x
    x = 4,660,352,364.78/100,908.60
  6. Step 6: Final answer
    x = 46,183.90

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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.