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Finding the Fourth Proportional to 271,680.60, 407,520.90 and 72,031.80

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Solution

The fourth proportional to 271,680.60, 407,520.90 and 72,031.80 is: 108,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,680.60 : 407,520.90 = 72,031.80 : x
  2. Step 2: Convert to fraction form
    271,680.60/407,520.90 = 72,031.80/x
  3. Step 3: Cross multiply
    271,680.60x = 407,520.90 × 72,031.80
  4. Step 4: Simplify right side
    271,680.60x = 29,354,463,964.62
  5. Step 5: Solve for x
    x = 29,354,463,964.62/271,680.60
  6. Step 6: Final answer
    x = 108,047.70

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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.