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Finding the Fourth Proportional to 117,112.88, 161,617.12 and 65,431.60

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Solution

The fourth proportional to 117,112.88, 161,617.12 and 65,431.60 is: 90,296.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,112.88 : 161,617.12 = 65,431.60 : x
  2. Step 2: Convert to fraction form
    117,112.88/161,617.12 = 65,431.60/x
  3. Step 3: Cross multiply
    117,112.88x = 161,617.12 × 65,431.60
  4. Step 4: Simplify right side
    117,112.88x = 10,574,866,748.99
  5. Step 5: Solve for x
    x = 10,574,866,748.99/117,112.88
  6. Step 6: Final answer
    x = 90,296.36

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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.