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Finding the Fourth Proportional to 172,419.80, 258,644.28 and 46,079.24

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Solution

The fourth proportional to 172,419.80, 258,644.28 and 46,079.24 is: 69,122.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,419.80 : 258,644.28 = 46,079.24 : x
  2. Step 2: Convert to fraction form
    172,419.80/258,644.28 = 46,079.24/x
  3. Step 3: Cross multiply
    172,419.80x = 258,644.28 × 46,079.24
  4. Step 4: Simplify right side
    172,419.80x = 11,918,131,852.75
  5. Step 5: Solve for x
    x = 11,918,131,852.75/172,419.80
  6. Step 6: Final answer
    x = 69,122.76

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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.