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Finding the Fourth Proportional to 104,409.85, 156,504.90 and 66,487.95

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Solution

The fourth proportional to 104,409.85, 156,504.90 and 66,487.95 is: 99,661.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,409.85 : 156,504.90 = 66,487.95 : x
  2. Step 2: Convert to fraction form
    104,409.85/156,504.90 = 66,487.95/x
  3. Step 3: Cross multiply
    104,409.85x = 156,504.90 × 66,487.95
  4. Step 4: Simplify right side
    104,409.85x = 10,405,689,965.96
  5. Step 5: Solve for x
    x = 10,405,689,965.96/104,409.85
  6. Step 6: Final answer
    x = 99,661.96

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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.