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Finding the Fourth Proportional to 117,409.04, 161,986.20 and 66,416.84

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Solution

The fourth proportional to 117,409.04, 161,986.20 and 66,416.84 is: 91,633.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,409.04 : 161,986.20 = 66,416.84 : x
  2. Step 2: Convert to fraction form
    117,409.04/161,986.20 = 66,416.84/x
  3. Step 3: Cross multiply
    117,409.04x = 161,986.20 × 66,416.84
  4. Step 4: Simplify right side
    117,409.04x = 10,758,611,527.61
  5. Step 5: Solve for x
    x = 10,758,611,527.61/117,409.04
  6. Step 6: Final answer
    x = 91,633.59

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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.