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Finding the Fourth Proportional to 117,388.71, 161,996.41 and 66,400.34

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Solution

The fourth proportional to 117,388.71, 161,996.41 and 66,400.34 is: 91,632.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,388.71 : 161,996.41 = 66,400.34 : x
  2. Step 2: Convert to fraction form
    117,388.71/161,996.41 = 66,400.34/x
  3. Step 3: Cross multiply
    117,388.71x = 161,996.41 × 66,400.34
  4. Step 4: Simplify right side
    117,388.71x = 10,756,616,171.81
  5. Step 5: Solve for x
    x = 10,756,616,171.81/117,388.71
  6. Step 6: Final answer
    x = 91,632.46

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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.