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Finding the Fourth Proportional to 104,566.80, 156,639.60 and 72,868.80

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Solution

The fourth proportional to 104,566.80, 156,639.60 and 72,868.80 is: 109,156.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,566.80 : 156,639.60 = 72,868.80 : x
  2. Step 2: Convert to fraction form
    104,566.80/156,639.60 = 72,868.80/x
  3. Step 3: Cross multiply
    104,566.80x = 156,639.60 × 72,868.80
  4. Step 4: Simplify right side
    104,566.80x = 11,414,139,684.48
  5. Step 5: Solve for x
    x = 11,414,139,684.48/104,566.80
  6. Step 6: Final answer
    x = 109,156.44

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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.