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Finding the Fourth Proportional to 111,840.59, 154,289.16 and 66,492.84

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Solution

The fourth proportional to 111,840.59, 154,289.16 and 66,492.84 is: 91,729.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,840.59 : 154,289.16 = 66,492.84 : x
  2. Step 2: Convert to fraction form
    111,840.59/154,289.16 = 66,492.84/x
  3. Step 3: Cross multiply
    111,840.59x = 154,289.16 × 66,492.84
  4. Step 4: Simplify right side
    111,840.59x = 10,259,124,429.61
  5. Step 5: Solve for x
    x = 10,259,124,429.61/111,840.59
  6. Step 6: Final answer
    x = 91,729.88

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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.