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Finding the Fourth Proportional to 86,231.89, 129,201.58 and 61,147.00

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Solution

The fourth proportional to 86,231.89, 129,201.58 and 61,147.00 is: 91,616.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231.89 : 129,201.58 = 61,147.00 : x
  2. Step 2: Convert to fraction form
    86,231.89/129,201.58 = 61,147.00/x
  3. Step 3: Cross multiply
    86,231.89x = 129,201.58 × 61,147.00
  4. Step 4: Simplify right side
    86,231.89x = 7,900,289,250.20
  5. Step 5: Solve for x
    x = 7,900,289,250.20/86,231.89
  6. Step 6: Final answer
    x = 91,616.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.