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Finding the Fourth Proportional to 111,762.87, 154,289.88 and 86,211.88

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Solution

The fourth proportional to 111,762.87, 154,289.88 and 86,211.88 is: 119,016.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,762.87 : 154,289.88 = 86,211.88 : x
  2. Step 2: Convert to fraction form
    111,762.87/154,289.88 = 86,211.88/x
  3. Step 3: Cross multiply
    111,762.87x = 154,289.88 × 86,211.88
  4. Step 4: Simplify right side
    111,762.87x = 13,301,620,234.05
  5. Step 5: Solve for x
    x = 13,301,620,234.05/111,762.87
  6. Step 6: Final answer
    x = 119,016.45

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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.