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Finding the Fourth Proportional to 281,201.87, 388,066.21 and 172,304.33

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Solution

The fourth proportional to 281,201.87, 388,066.21 and 172,304.33 is: 237,784.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,201.87 : 388,066.21 = 172,304.33 : x
  2. Step 2: Convert to fraction form
    281,201.87/388,066.21 = 172,304.33/x
  3. Step 3: Cross multiply
    281,201.87x = 388,066.21 × 172,304.33
  4. Step 4: Simplify right side
    281,201.87x = 66,865,485,938.60
  5. Step 5: Solve for x
    x = 66,865,485,938.60/281,201.87
  6. Step 6: Final answer
    x = 237,784.64

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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.