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Finding the Fourth Proportional to 172,929.20, 259,473.96 and 73,112.67

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Solution

The fourth proportional to 172,929.20, 259,473.96 and 73,112.67 is: 109,702.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,929.20 : 259,473.96 = 73,112.67 : x
  2. Step 2: Convert to fraction form
    172,929.20/259,473.96 = 73,112.67/x
  3. Step 3: Cross multiply
    172,929.20x = 259,473.96 × 73,112.67
  4. Step 4: Simplify right side
    172,929.20x = 18,970,834,011.07
  5. Step 5: Solve for x
    x = 18,970,834,011.07/172,929.20
  6. Step 6: Final answer
    x = 109,702.90

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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.