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Finding the Fourth Proportional to 136,665.61, 188,540.41 and 85,643.62

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Solution

The fourth proportional to 136,665.61, 188,540.41 and 85,643.62 is: 118,151.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,665.61 : 188,540.41 = 85,643.62 : x
  2. Step 2: Convert to fraction form
    136,665.61/188,540.41 = 85,643.62/x
  3. Step 3: Cross multiply
    136,665.61x = 188,540.41 × 85,643.62
  4. Step 4: Simplify right side
    136,665.61x = 16,147,283,228.68
  5. Step 5: Solve for x
    x = 16,147,283,228.68/136,665.61
  6. Step 6: Final answer
    x = 118,151.77

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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.