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Finding the Fourth Proportional to 111,808.76, 154,296.36 and 61,507.76

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Solution

The fourth proportional to 111,808.76, 154,296.36 and 61,507.76 is: 84,880.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,808.76 : 154,296.36 = 61,507.76 : x
  2. Step 2: Convert to fraction form
    111,808.76/154,296.36 = 61,507.76/x
  3. Step 3: Cross multiply
    111,808.76x = 154,296.36 × 61,507.76
  4. Step 4: Simplify right side
    111,808.76x = 9,490,422,708.27
  5. Step 5: Solve for x
    x = 9,490,422,708.27/111,808.76
  6. Step 6: Final answer
    x = 84,880.85

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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.