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Finding the Fourth Proportional to 117,018.44, 161,485.44 and 66,041.96

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Solution

The fourth proportional to 117,018.44, 161,485.44 and 66,041.96 is: 91,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,018.44 : 161,485.44 = 66,041.96 : x
  2. Step 2: Convert to fraction form
    117,018.44/161,485.44 = 66,041.96/x
  3. Step 3: Cross multiply
    117,018.44x = 161,485.44 × 66,041.96
  4. Step 4: Simplify right side
    117,018.44x = 10,664,814,969.06
  5. Step 5: Solve for x
    x = 10,664,814,969.06/117,018.44
  6. Step 6: Final answer
    x = 91,137.90

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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.