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Finding the Fourth Proportional to 76,609.70, 105,634.21 and 53,941.44

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Solution

The fourth proportional to 76,609.70, 105,634.21 and 53,941.44 is: 74,377.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,609.70 : 105,634.21 = 53,941.44 : x
  2. Step 2: Convert to fraction form
    76,609.70/105,634.21 = 53,941.44/x
  3. Step 3: Cross multiply
    76,609.70x = 105,634.21 × 53,941.44
  4. Step 4: Simplify right side
    76,609.70x = 5,698,061,400.66
  5. Step 5: Solve for x
    x = 5,698,061,400.66/76,609.70
  6. Step 6: Final answer
    x = 74,377.81

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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.