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Finding the Fourth Proportional to 86,812.36, 119,854.89 and 66,630.60

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Solution

The fourth proportional to 86,812.36, 119,854.89 and 66,630.60 is: 91,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,812.36 : 119,854.89 = 66,630.60 : x
  2. Step 2: Convert to fraction form
    86,812.36/119,854.89 = 66,630.60/x
  3. Step 3: Cross multiply
    86,812.36x = 119,854.89 × 66,630.60
  4. Step 4: Simplify right side
    86,812.36x = 7,986,003,233.63
  5. Step 5: Solve for x
    x = 7,986,003,233.63/86,812.36
  6. Step 6: Final answer
    x = 91,991.55

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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.