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Finding the Fourth Proportional to 76,544.85, 105,683.44 and 68,453.40

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Solution

The fourth proportional to 76,544.85, 105,683.44 and 68,453.40 is: 94,511.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,544.85 : 105,683.44 = 68,453.40 : x
  2. Step 2: Convert to fraction form
    76,544.85/105,683.44 = 68,453.40/x
  3. Step 3: Cross multiply
    76,544.85x = 105,683.44 × 68,453.40
  4. Step 4: Simplify right side
    76,544.85x = 7,234,391,139.59
  5. Step 5: Solve for x
    x = 7,234,391,139.59/76,544.85
  6. Step 6: Final answer
    x = 94,511.79

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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.