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Finding the Fourth Proportional to 111,833.49, 154,339.11 and 64,091.28

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Solution

The fourth proportional to 111,833.49, 154,339.11 and 64,091.28 is: 88,451.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,833.49 : 154,339.11 = 64,091.28 : x
  2. Step 2: Convert to fraction form
    111,833.49/154,339.11 = 64,091.28/x
  3. Step 3: Cross multiply
    111,833.49x = 154,339.11 × 64,091.28
  4. Step 4: Simplify right side
    111,833.49x = 9,891,791,113.96
  5. Step 5: Solve for x
    x = 9,891,791,113.96/111,833.49
  6. Step 6: Final answer
    x = 88,451.06

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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.