Home / 111,309.19-166,352.64-81,386.44

Finding the Fourth Proportional to 111,309.19, 166,352.64 and 81,386.44

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Solution

The fourth proportional to 111,309.19, 166,352.64 and 81,386.44 is: 121,632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,309.19 : 166,352.64 = 81,386.44 : x
  2. Step 2: Convert to fraction form
    111,309.19/166,352.64 = 81,386.44/x
  3. Step 3: Cross multiply
    111,309.19x = 166,352.64 × 81,386.44
  4. Step 4: Simplify right side
    111,309.19x = 13,538,848,433.12
  5. Step 5: Solve for x
    x = 13,538,848,433.12/111,309.19
  6. Step 6: Final answer
    x = 121,632.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.