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Finding the Fourth Proportional to 104,428.94, 156,405.68 and 81,798.36

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Solution

The fourth proportional to 104,428.94, 156,405.68 and 81,798.36 is: 122,511.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,428.94 : 156,405.68 = 81,798.36 : x
  2. Step 2: Convert to fraction form
    104,428.94/156,405.68 = 81,798.36/x
  3. Step 3: Cross multiply
    104,428.94x = 156,405.68 × 81,798.36
  4. Step 4: Simplify right side
    104,428.94x = 12,793,728,118.68
  5. Step 5: Solve for x
    x = 12,793,728,118.68/104,428.94
  6. Step 6: Final answer
    x = 122,511.33

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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.