Home / 81,534.56-122,313.96-28,939.64

Finding the Fourth Proportional to 81,534.56, 122,313.96 and 28,939.64

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Solution

The fourth proportional to 81,534.56, 122,313.96 and 28,939.64 is: 43,413.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,534.56 : 122,313.96 = 28,939.64 : x
  2. Step 2: Convert to fraction form
    81,534.56/122,313.96 = 28,939.64/x
  3. Step 3: Cross multiply
    81,534.56x = 122,313.96 × 28,939.64
  4. Step 4: Simplify right side
    81,534.56x = 3,539,721,969.37
  5. Step 5: Solve for x
    x = 3,539,721,969.37/81,534.56
  6. Step 6: Final answer
    x = 43,413.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.