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Finding the Fourth Proportional to 121,736.52, 168,043.20 and 108,967.12

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Solution

The fourth proportional to 121,736.52, 168,043.20 and 108,967.12 is: 150,416.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,736.52 : 168,043.20 = 108,967.12 : x
  2. Step 2: Convert to fraction form
    121,736.52/168,043.20 = 108,967.12/x
  3. Step 3: Cross multiply
    121,736.52x = 168,043.20 × 108,967.12
  4. Step 4: Simplify right side
    121,736.52x = 18,311,183,539.58
  5. Step 5: Solve for x
    x = 18,311,183,539.58/121,736.52
  6. Step 6: Final answer
    x = 150,416.52

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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.