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Finding the Fourth Proportional to 167,555.42, 251,351.45 and 72,720.42

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Solution

The fourth proportional to 167,555.42, 251,351.45 and 72,720.42 is: 109,088.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,555.42 : 251,351.45 = 72,720.42 : x
  2. Step 2: Convert to fraction form
    167,555.42/251,351.45 = 72,720.42/x
  3. Step 3: Cross multiply
    167,555.42x = 251,351.45 × 72,720.42
  4. Step 4: Simplify right side
    167,555.42x = 18,278,383,011.61
  5. Step 5: Solve for x
    x = 18,278,383,011.61/167,555.42
  6. Step 6: Final answer
    x = 109,088.58

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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.