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Finding the Fourth Proportional to 100,436.61, 150,748.88 and 53,086.85

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Solution

The fourth proportional to 100,436.61, 150,748.88 and 53,086.85 is: 79,679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.61 : 150,748.88 = 53,086.85 : x
  2. Step 2: Convert to fraction form
    100,436.61/150,748.88 = 53,086.85/x
  3. Step 3: Cross multiply
    100,436.61x = 150,748.88 × 53,086.85
  4. Step 4: Simplify right side
    100,436.61x = 8,002,782,161.05
  5. Step 5: Solve for x
    x = 8,002,782,161.05/100,436.61
  6. Step 6: Final answer
    x = 79,679.93

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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.