Home / 81,409.23-122,127.70-28,086.75

Finding the Fourth Proportional to 81,409.23, 122,127.70 and 28,086.75

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Solution

The fourth proportional to 81,409.23, 122,127.70 and 28,086.75 is: 42,134.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,409.23 : 122,127.70 = 28,086.75 : x
  2. Step 2: Convert to fraction form
    81,409.23/122,127.70 = 28,086.75/x
  3. Step 3: Cross multiply
    81,409.23x = 122,127.70 × 28,086.75
  4. Step 4: Simplify right side
    81,409.23x = 3,430,170,177.98
  5. Step 5: Solve for x
    x = 3,430,170,177.98/81,409.23
  6. Step 6: Final answer
    x = 42,134.91

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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.