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Finding the Fourth Proportional to 219,912.60, 329,825.70 and 72,168.60

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Solution

The fourth proportional to 219,912.60, 329,825.70 and 72,168.60 is: 108,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,912.60 : 329,825.70 = 72,168.60 : x
  2. Step 2: Convert to fraction form
    219,912.60/329,825.70 = 72,168.60/x
  3. Step 3: Cross multiply
    219,912.60x = 329,825.70 × 72,168.60
  4. Step 4: Simplify right side
    219,912.60x = 23,803,059,013.02
  5. Step 5: Solve for x
    x = 23,803,059,013.02/219,912.60
  6. Step 6: Final answer
    x = 108,238.72

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1.5x scale

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.