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Finding the Fourth Proportional to 104,638.60, 156,738.30 and 82,346.68

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Solution

The fourth proportional to 104,638.60, 156,738.30 and 82,346.68 is: 123,347.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,638.60 : 156,738.30 = 82,346.68 : x
  2. Step 2: Convert to fraction form
    104,638.60/156,738.30 = 82,346.68/x
  3. Step 3: Cross multiply
    104,638.60x = 156,738.30 × 82,346.68
  4. Step 4: Simplify right side
    104,638.60x = 12,906,878,633.84
  5. Step 5: Solve for x
    x = 12,906,878,633.84/104,638.60
  6. Step 6: Final answer
    x = 123,347.20

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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.