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Finding the Fourth Proportional to 135,808.20, 187,437.84 and 79,219.68

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Solution

The fourth proportional to 135,808.20, 187,437.84 and 79,219.68 is: 109,336.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,808.20 : 187,437.84 = 79,219.68 : x
  2. Step 2: Convert to fraction form
    135,808.20/187,437.84 = 79,219.68/x
  3. Step 3: Cross multiply
    135,808.20x = 187,437.84 × 79,219.68
  4. Step 4: Simplify right side
    135,808.20x = 14,848,765,704.69
  5. Step 5: Solve for x
    x = 14,848,765,704.69/135,808.20
  6. Step 6: Final answer
    x = 109,336.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.