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Finding the Fourth Proportional to 111,331.94, 153,639.45 and 65,388.60

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Solution

The fourth proportional to 111,331.94, 153,639.45 and 65,388.60 is: 90,237.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,331.94 : 153,639.45 = 65,388.60 : x
  2. Step 2: Convert to fraction form
    111,331.94/153,639.45 = 65,388.60/x
  3. Step 3: Cross multiply
    111,331.94x = 153,639.45 × 65,388.60
  4. Step 4: Simplify right side
    111,331.94x = 10,046,268,540.27
  5. Step 5: Solve for x
    x = 10,046,268,540.27/111,331.94
  6. Step 6: Final answer
    x = 90,237.08

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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.