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Finding the Fourth Proportional to 104,639.60, 156,739.80 and 82,347.68

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Solution

The fourth proportional to 104,639.60, 156,739.80 and 82,347.68 is: 123,348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,639.60 : 156,739.80 = 82,347.68 : x
  2. Step 2: Convert to fraction form
    104,639.60/156,739.80 = 82,347.68/x
  3. Step 3: Cross multiply
    104,639.60x = 156,739.80 × 82,347.68
  4. Step 4: Simplify right side
    104,639.60x = 12,907,158,893.66
  5. Step 5: Solve for x
    x = 12,907,158,893.66/104,639.60
  6. Step 6: Final answer
    x = 123,348.70

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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.