Home / 81,522.74-122,289.32-28,219.85

Finding the Fourth Proportional to 81,522.74, 122,289.32 and 28,219.85

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Solution

The fourth proportional to 81,522.74, 122,289.32 and 28,219.85 is: 42,331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,522.74 : 122,289.32 = 28,219.85 : x
  2. Step 2: Convert to fraction form
    81,522.74/122,289.32 = 28,219.85/x
  3. Step 3: Cross multiply
    81,522.74x = 122,289.32 × 28,219.85
  4. Step 4: Simplify right side
    81,522.74x = 3,450,985,726.11
  5. Step 5: Solve for x
    x = 3,450,985,726.11/81,522.74
  6. Step 6: Final answer
    x = 42,331.57

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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.