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Finding the Fourth Proportional to 117,203.98, 161,729.89 and 65,511.40

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Solution

The fourth proportional to 117,203.98, 161,729.89 and 65,511.40 is: 90,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,203.98 : 161,729.89 = 65,511.40 : x
  2. Step 2: Convert to fraction form
    117,203.98/161,729.89 = 65,511.40/x
  3. Step 3: Cross multiply
    117,203.98x = 161,729.89 × 65,511.40
  4. Step 4: Simplify right side
    117,203.98x = 10,595,151,515.75
  5. Step 5: Solve for x
    x = 10,595,151,515.75/117,203.98
  6. Step 6: Final answer
    x = 90,399.25

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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.