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Finding the Fourth Proportional to 196,958.64, 271,710 and 143,220

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Solution

The fourth proportional to 196,958.64, 271,710 and 143,220 is: 197,576.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,958.64 : 271,710 = 143,220 : x
  2. Step 2: Convert to fraction form
    196,958.64/271,710 = 143,220/x
  3. Step 3: Cross multiply
    196,958.64x = 271,710 × 143,220
  4. Step 4: Simplify right side
    196,958.64x = 38,914,306,200
  5. Step 5: Solve for x
    x = 38,914,306,200/196,958.64
  6. Step 6: Final answer
    x = 197,576.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.