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Finding the Fourth Proportional to 111,881.45, 154,453.53 and 86,330.41

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Solution

The fourth proportional to 111,881.45, 154,453.53 and 86,330.41 is: 119,180.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,881.45 : 154,453.53 = 86,330.41 : x
  2. Step 2: Convert to fraction form
    111,881.45/154,453.53 = 86,330.41/x
  3. Step 3: Cross multiply
    111,881.45x = 154,453.53 × 86,330.41
  4. Step 4: Simplify right side
    111,881.45x = 13,334,036,508.45
  5. Step 5: Solve for x
    x = 13,334,036,508.45/111,881.45
  6. Step 6: Final answer
    x = 119,180.04

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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.