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Finding the Fourth Proportional to 223,728.39, 308,736.09 and 128,168.64

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Solution

The fourth proportional to 223,728.39, 308,736.09 and 128,168.64 is: 176,867.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,728.39 : 308,736.09 = 128,168.64 : x
  2. Step 2: Convert to fraction form
    223,728.39/308,736.09 = 128,168.64/x
  3. Step 3: Cross multiply
    223,728.39x = 308,736.09 × 128,168.64
  4. Step 4: Simplify right side
    223,728.39x = 39,570,284,774.22
  5. Step 5: Solve for x
    x = 39,570,284,774.22/223,728.39
  6. Step 6: Final answer
    x = 176,867.52

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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.