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Finding the Fourth Proportional to 82,921.60, 124,200.96 and 68,809.60

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Solution

The fourth proportional to 82,921.60, 124,200.96 and 68,809.60 is: 103,063.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,921.60 : 124,200.96 = 68,809.60 : x
  2. Step 2: Convert to fraction form
    82,921.60/124,200.96 = 68,809.60/x
  3. Step 3: Cross multiply
    82,921.60x = 124,200.96 × 68,809.60
  4. Step 4: Simplify right side
    82,921.60x = 8,546,218,377.22
  5. Step 5: Solve for x
    x = 8,546,218,377.22/82,921.60
  6. Step 6: Final answer
    x = 103,063.84

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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.