Home / 81,450.24-122,140.80-28,872.96

Finding the Fourth Proportional to 81,450.24, 122,140.80 and 28,872.96

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Solution

The fourth proportional to 81,450.24, 122,140.80 and 28,872.96 is: 43,297.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.24 : 122,140.80 = 28,872.96 : x
  2. Step 2: Convert to fraction form
    81,450.24/122,140.80 = 28,872.96/x
  3. Step 3: Cross multiply
    81,450.24x = 122,140.80 × 28,872.96
  4. Step 4: Simplify right side
    81,450.24x = 3,526,566,432.77
  5. Step 5: Solve for x
    x = 3,526,566,432.77/81,450.24
  6. Step 6: Final answer
    x = 43,297.19

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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.