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Finding the Fourth Proportional to 86,405.67, 119,255.09 and 68,636.30

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Solution

The fourth proportional to 86,405.67, 119,255.09 and 68,636.30 is: 94,730.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,405.67 : 119,255.09 = 68,636.30 : x
  2. Step 2: Convert to fraction form
    86,405.67/119,255.09 = 68,636.30/x
  3. Step 3: Cross multiply
    86,405.67x = 119,255.09 × 68,636.30
  4. Step 4: Simplify right side
    86,405.67x = 8,185,227,194.31
  5. Step 5: Solve for x
    x = 8,185,227,194.31/86,405.67
  6. Step 6: Final answer
    x = 94,730.21

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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.