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Finding the Fourth Proportional to 77,612.76, 116,416.76 and 21,456.27

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Solution

The fourth proportional to 77,612.76, 116,416.76 and 21,456.27 is: 32,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,612.76 : 116,416.76 = 21,456.27 : x
  2. Step 2: Convert to fraction form
    77,612.76/116,416.76 = 21,456.27/x
  3. Step 3: Cross multiply
    77,612.76x = 116,416.76 × 21,456.27
  4. Step 4: Simplify right side
    77,612.76x = 2,497,869,327.80
  5. Step 5: Solve for x
    x = 2,497,869,327.80/77,612.76
  6. Step 6: Final answer
    x = 32,183.75

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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.