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Finding the Fourth Proportional to 53,143.99, 79,717.17 and 19,845.89

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Solution

The fourth proportional to 53,143.99, 79,717.17 and 19,845.89 is: 29,769.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,143.99 : 79,717.17 = 19,845.89 : x
  2. Step 2: Convert to fraction form
    53,143.99/79,717.17 = 19,845.89/x
  3. Step 3: Cross multiply
    53,143.99x = 79,717.17 × 19,845.89
  4. Step 4: Simplify right side
    53,143.99x = 1,582,057,788.35
  5. Step 5: Solve for x
    x = 1,582,057,788.35/53,143.99
  6. Step 6: Final answer
    x = 29,769.27

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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.