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Finding the Fourth Proportional to 76,045.43, 104,874.55 and 63,340.79

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Solution

The fourth proportional to 76,045.43, 104,874.55 and 63,340.79 is: 87,353.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,045.43 : 104,874.55 = 63,340.79 : x
  2. Step 2: Convert to fraction form
    76,045.43/104,874.55 = 63,340.79/x
  3. Step 3: Cross multiply
    76,045.43x = 104,874.55 × 63,340.79
  4. Step 4: Simplify right side
    76,045.43x = 6,642,836,165.17
  5. Step 5: Solve for x
    x = 6,642,836,165.17/76,045.43
  6. Step 6: Final answer
    x = 87,353.52

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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.