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Finding the Fourth Proportional to 122,181.99, 168,610.92 and 74,435.32

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Solution

The fourth proportional to 122,181.99, 168,610.92 and 74,435.32 is: 102,720.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,181.99 : 168,610.92 = 74,435.32 : x
  2. Step 2: Convert to fraction form
    122,181.99/168,610.92 = 74,435.32/x
  3. Step 3: Cross multiply
    122,181.99x = 168,610.92 × 74,435.32
  4. Step 4: Simplify right side
    122,181.99x = 12,550,607,717.33
  5. Step 5: Solve for x
    x = 12,550,607,717.33/122,181.99
  6. Step 6: Final answer
    x = 102,720.61

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1.5x scale

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.