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Finding the Fourth Proportional to 86,993.66, 120,109.10 and 66,814.47

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Solution

The fourth proportional to 86,993.66, 120,109.10 and 66,814.47 is: 92,248.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,993.66 : 120,109.10 = 66,814.47 : x
  2. Step 2: Convert to fraction form
    86,993.66/120,109.10 = 66,814.47/x
  3. Step 3: Cross multiply
    86,993.66x = 120,109.10 × 66,814.47
  4. Step 4: Simplify right side
    86,993.66x = 8,025,025,524.60
  5. Step 5: Solve for x
    x = 8,025,025,524.60/86,993.66
  6. Step 6: Final answer
    x = 92,248.39

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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.