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Finding the Fourth Proportional to 111,856.57, 154,362.09 and 61,555.57

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Solution

The fourth proportional to 111,856.57, 154,362.09 and 61,555.57 is: 84,946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,856.57 : 154,362.09 = 61,555.57 : x
  2. Step 2: Convert to fraction form
    111,856.57/154,362.09 = 61,555.57/x
  3. Step 3: Cross multiply
    111,856.57x = 154,362.09 × 61,555.57
  4. Step 4: Simplify right side
    111,856.57x = 9,501,846,628.85
  5. Step 5: Solve for x
    x = 9,501,846,628.85/111,856.57
  6. Step 6: Final answer
    x = 84,946.70

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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.