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Finding the Fourth Proportional to 76,718.91, 105,843.45 and 76,600.64

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Solution

The fourth proportional to 76,718.91, 105,843.45 and 76,600.64 is: 105,680.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,718.91 : 105,843.45 = 76,600.64 : x
  2. Step 2: Convert to fraction form
    76,718.91/105,843.45 = 76,600.64/x
  3. Step 3: Cross multiply
    76,718.91x = 105,843.45 × 76,600.64
  4. Step 4: Simplify right side
    76,718.91x = 8,107,676,274.42
  5. Step 5: Solve for x
    x = 8,107,676,274.42/76,718.91
  6. Step 6: Final answer
    x = 105,680.28

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1.5x scale

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.