Home / 81,968.76-112,379.60-80,474.31

Finding the Fourth Proportional to 81,968.76, 112,379.60 and 80,474.31

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Solution

The fourth proportional to 81,968.76, 112,379.60 and 80,474.31 is: 110,330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,968.76 : 112,379.60 = 80,474.31 : x
  2. Step 2: Convert to fraction form
    81,968.76/112,379.60 = 80,474.31/x
  3. Step 3: Cross multiply
    81,968.76x = 112,379.60 × 80,474.31
  4. Step 4: Simplify right side
    81,968.76x = 9,043,670,969.26
  5. Step 5: Solve for x
    x = 9,043,670,969.26/81,968.76
  6. Step 6: Final answer
    x = 110,330.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.