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Finding the Fourth Proportional to 172,473.20, 238,012.68 and 97,021.70

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Solution

The fourth proportional to 172,473.20, 238,012.68 and 97,021.70 is: 133,889.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,473.20 : 238,012.68 = 97,021.70 : x
  2. Step 2: Convert to fraction form
    172,473.20/238,012.68 = 97,021.70/x
  3. Step 3: Cross multiply
    172,473.20x = 238,012.68 × 97,021.70
  4. Step 4: Simplify right side
    172,473.20x = 23,092,394,835.16
  5. Step 5: Solve for x
    x = 23,092,394,835.16/172,473.20
  6. Step 6: Final answer
    x = 133,889.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.