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Finding the Fourth Proportional to 223,609.64, 308,583.62 and 128,114.28

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Solution

The fourth proportional to 223,609.64, 308,583.62 and 128,114.28 is: 176,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,609.64 : 308,583.62 = 128,114.28 : x
  2. Step 2: Convert to fraction form
    223,609.64/308,583.62 = 128,114.28/x
  3. Step 3: Cross multiply
    223,609.64x = 308,583.62 × 128,114.28
  4. Step 4: Simplify right side
    223,609.64x = 39,533,968,296.09
  5. Step 5: Solve for x
    x = 39,533,968,296.09/223,609.64
  6. Step 6: Final answer
    x = 176,799.03

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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.