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Finding the Fourth Proportional to 221,043.16, 331,629.44 and 71,280.44

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Solution

The fourth proportional to 221,043.16, 331,629.44 and 71,280.44 is: 106,941.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,043.16 : 331,629.44 = 71,280.44 : x
  2. Step 2: Convert to fraction form
    221,043.16/331,629.44 = 71,280.44/x
  3. Step 3: Cross multiply
    221,043.16x = 331,629.44 × 71,280.44
  4. Step 4: Simplify right side
    221,043.16x = 23,638,692,400.15
  5. Step 5: Solve for x
    x = 23,638,692,400.15/221,043.16
  6. Step 6: Final answer
    x = 106,941.52

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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.