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Finding the Fourth Proportional to 171,833.40, 257,938.70 and 136,521.72

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Solution

The fourth proportional to 171,833.40, 257,938.70 and 136,521.72 is: 204,932.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,833.40 : 257,938.70 = 136,521.72 : x
  2. Step 2: Convert to fraction form
    171,833.40/257,938.70 = 136,521.72/x
  3. Step 3: Cross multiply
    171,833.40x = 257,938.70 × 136,521.72
  4. Step 4: Simplify right side
    171,833.40x = 35,214,234,295.96
  5. Step 5: Solve for x
    x = 35,214,234,295.96/171,833.40
  6. Step 6: Final answer
    x = 204,932.42

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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.