Home / 81,738.20-122,603.90-28,442.37

Finding the Fourth Proportional to 81,738.20, 122,603.90 and 28,442.37

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Solution

The fourth proportional to 81,738.20, 122,603.90 and 28,442.37 is: 42,662.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,738.20 : 122,603.90 = 28,442.37 : x
  2. Step 2: Convert to fraction form
    81,738.20/122,603.90 = 28,442.37/x
  3. Step 3: Cross multiply
    81,738.20x = 122,603.90 × 28,442.37
  4. Step 4: Simplify right side
    81,738.20x = 3,487,145,345.03
  5. Step 5: Solve for x
    x = 3,487,145,345.03/81,738.20
  6. Step 6: Final answer
    x = 42,662.37

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1.5x scale

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.