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Finding the Fourth Proportional to 219,909.20, 329,863.80 and 167,421.20

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Solution

The fourth proportional to 219,909.20, 329,863.80 and 167,421.20 is: 251,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,909.20 : 329,863.80 = 167,421.20 : x
  2. Step 2: Convert to fraction form
    219,909.20/329,863.80 = 167,421.20/x
  3. Step 3: Cross multiply
    219,909.20x = 329,863.80 × 167,421.20
  4. Step 4: Simplify right side
    219,909.20x = 55,226,193,232.56
  5. Step 5: Solve for x
    x = 55,226,193,232.56/219,909.20
  6. Step 6: Final answer
    x = 251,131.80

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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.