Home / 149,257.80-205,975.44-81,273.72

Finding the Fourth Proportional to 149,257.80, 205,975.44 and 81,273.72

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Solution

The fourth proportional to 149,257.80, 205,975.44 and 81,273.72 is: 112,157.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,257.80 : 205,975.44 = 81,273.72 : x
  2. Step 2: Convert to fraction form
    149,257.80/205,975.44 = 81,273.72/x
  3. Step 3: Cross multiply
    149,257.80x = 205,975.44 × 81,273.72
  4. Step 4: Simplify right side
    149,257.80x = 16,740,390,237.44
  5. Step 5: Solve for x
    x = 16,740,390,237.44/149,257.80
  6. Step 6: Final answer
    x = 112,157.56

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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.