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Finding the Fourth Proportional to 117,129.60, 161,611.20 and 66,844.80

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Solution

The fourth proportional to 117,129.60, 161,611.20 and 66,844.80 is: 92,230.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.60 : 161,611.20 = 66,844.80 : x
  2. Step 2: Convert to fraction form
    117,129.60/161,611.20 = 66,844.80/x
  3. Step 3: Cross multiply
    117,129.60x = 161,611.20 × 66,844.80
  4. Step 4: Simplify right side
    117,129.60x = 10,802,868,341.76
  5. Step 5: Solve for x
    x = 10,802,868,341.76/117,129.60
  6. Step 6: Final answer
    x = 92,230.05

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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.