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Finding the Fourth Proportional to 74,790.99, 112,239 and 67,644.51

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Solution

The fourth proportional to 74,790.99, 112,239 and 67,644.51 is: 101,514.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,790.99 : 112,239 = 67,644.51 : x
  2. Step 2: Convert to fraction form
    74,790.99/112,239 = 67,644.51/x
  3. Step 3: Cross multiply
    74,790.99x = 112,239 × 67,644.51
  4. Step 4: Simplify right side
    74,790.99x = 7,592,352,157.89
  5. Step 5: Solve for x
    x = 7,592,352,157.89/74,790.99
  6. Step 6: Final answer
    x = 101,514.26

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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.