Home / 121,816.08-168,105.42-68,100.84

Finding the Fourth Proportional to 121,816.08, 168,105.42 and 68,100.84

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Solution

The fourth proportional to 121,816.08, 168,105.42 and 68,100.84 is: 93,978.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,816.08 : 168,105.42 = 68,100.84 : x
  2. Step 2: Convert to fraction form
    121,816.08/168,105.42 = 68,100.84/x
  3. Step 3: Cross multiply
    121,816.08x = 168,105.42 × 68,100.84
  4. Step 4: Simplify right side
    121,816.08x = 11,448,120,310.55
  5. Step 5: Solve for x
    x = 11,448,120,310.55/121,816.08
  6. Step 6: Final answer
    x = 93,978.73

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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.