Home / 81,452.84-122,149.26-28,131.26

Finding the Fourth Proportional to 81,452.84, 122,149.26 and 28,131.26

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Solution

The fourth proportional to 81,452.84, 122,149.26 and 28,131.26 is: 42,186.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,452.84 : 122,149.26 = 28,131.26 : x
  2. Step 2: Convert to fraction form
    81,452.84/122,149.26 = 28,131.26/x
  3. Step 3: Cross multiply
    81,452.84x = 122,149.26 × 28,131.26
  4. Step 4: Simplify right side
    81,452.84x = 3,436,211,981.12
  5. Step 5: Solve for x
    x = 3,436,211,981.12/81,452.84
  6. Step 6: Final answer
    x = 42,186.52

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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.