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Finding the Fourth Proportional to 112,469.72, 168,620.54 and 68,085.77

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Solution

The fourth proportional to 112,469.72, 168,620.54 and 68,085.77 is: 102,077.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,469.72 : 168,620.54 = 68,085.77 : x
  2. Step 2: Convert to fraction form
    112,469.72/168,620.54 = 68,085.77/x
  3. Step 3: Cross multiply
    112,469.72x = 168,620.54 × 68,085.77
  4. Step 4: Simplify right side
    112,469.72x = 11,480,658,120.18
  5. Step 5: Solve for x
    x = 11,480,658,120.18/112,469.72
  6. Step 6: Final answer
    x = 102,077.77

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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.