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Finding the Fourth Proportional to 169,421.78, 253,967.42 and 80,651.44

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Solution

The fourth proportional to 169,421.78, 253,967.42 and 80,651.44 is: 120,898.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,421.78 : 253,967.42 = 80,651.44 : x
  2. Step 2: Convert to fraction form
    169,421.78/253,967.42 = 80,651.44/x
  3. Step 3: Cross multiply
    169,421.78x = 253,967.42 × 80,651.44
  4. Step 4: Simplify right side
    169,421.78x = 20,482,838,136.08
  5. Step 5: Solve for x
    x = 20,482,838,136.08/169,421.78
  6. Step 6: Final answer
    x = 120,898.49

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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.