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Finding the Fourth Proportional to 53,190.73, 79,788.12 and 19,907.29

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Solution

The fourth proportional to 53,190.73, 79,788.12 and 19,907.29 is: 29,861.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,190.73 : 79,788.12 = 19,907.29 : x
  2. Step 2: Convert to fraction form
    53,190.73/79,788.12 = 19,907.29/x
  3. Step 3: Cross multiply
    53,190.73x = 79,788.12 × 19,907.29
  4. Step 4: Simplify right side
    53,190.73x = 1,588,365,243.39
  5. Step 5: Solve for x
    x = 1,588,365,243.39/53,190.73
  6. Step 6: Final answer
    x = 29,861.69

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1.5x scale

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.