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Finding the Fourth Proportional to 100,391.37, 150,291.18 and 87,935.73

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Solution

The fourth proportional to 100,391.37, 150,291.18 and 87,935.73 is: 131,644.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,391.37 : 150,291.18 = 87,935.73 : x
  2. Step 2: Convert to fraction form
    100,391.37/150,291.18 = 87,935.73/x
  3. Step 3: Cross multiply
    100,391.37x = 150,291.18 × 87,935.73
  4. Step 4: Simplify right side
    100,391.37x = 13,215,964,625.86
  5. Step 5: Solve for x
    x = 13,215,964,625.86/100,391.37
  6. Step 6: Final answer
    x = 131,644.43

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1.5x scale

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.