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Finding the Fourth Proportional to 101,891.64, 152,638.65 and 66,724.68

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Solution

The fourth proportional to 101,891.64, 152,638.65 and 66,724.68 is: 99,956.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,891.64 : 152,638.65 = 66,724.68 : x
  2. Step 2: Convert to fraction form
    101,891.64/152,638.65 = 66,724.68/x
  3. Step 3: Cross multiply
    101,891.64x = 152,638.65 × 66,724.68
  4. Step 4: Simplify right side
    101,891.64x = 10,184,765,076.88
  5. Step 5: Solve for x
    x = 10,184,765,076.88/101,891.64
  6. Step 6: Final answer
    x = 99,956.83

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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.