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Finding the Fourth Proportional to 64,788.42, 89,409.49 and 36,111.03

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Solution

The fourth proportional to 64,788.42, 89,409.49 and 36,111.03 is: 49,834.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,788.42 : 89,409.49 = 36,111.03 : x
  2. Step 2: Convert to fraction form
    64,788.42/89,409.49 = 36,111.03/x
  3. Step 3: Cross multiply
    64,788.42x = 89,409.49 × 36,111.03
  4. Step 4: Simplify right side
    64,788.42x = 3,228,668,775.67
  5. Step 5: Solve for x
    x = 3,228,668,775.67/64,788.42
  6. Step 6: Final answer
    x = 49,834.04

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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.