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Finding the Fourth Proportional to 121,898.75, 168,224.86 and 68,183.60

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Solution

The fourth proportional to 121,898.75, 168,224.86 and 68,183.60 is: 94,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,898.75 : 168,224.86 = 68,183.60 : x
  2. Step 2: Convert to fraction form
    121,898.75/168,224.86 = 68,183.60/x
  3. Step 3: Cross multiply
    121,898.75x = 168,224.86 × 68,183.60
  4. Step 4: Simplify right side
    121,898.75x = 11,470,175,808.40
  5. Step 5: Solve for x
    x = 11,470,175,808.40/121,898.75
  6. Step 6: Final answer
    x = 94,095.93

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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.