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Finding the Fourth Proportional to 82,449.60, 123,528.60 and 69,910.80

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Solution

The fourth proportional to 82,449.60, 123,528.60 and 69,910.80 is: 104,742.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,449.60 : 123,528.60 = 69,910.80 : x
  2. Step 2: Convert to fraction form
    82,449.60/123,528.60 = 69,910.80/x
  3. Step 3: Cross multiply
    82,449.60x = 123,528.60 × 69,910.80
  4. Step 4: Simplify right side
    82,449.60x = 8,635,983,248.88
  5. Step 5: Solve for x
    x = 8,635,983,248.88/82,449.60
  6. Step 6: Final answer
    x = 104,742.57

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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.