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Finding the Fourth Proportional to 281,203.01, 388,067.76 and 172,305.45

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Solution

The fourth proportional to 281,203.01, 388,067.76 and 172,305.45 is: 237,786.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,203.01 : 388,067.76 = 172,305.45 : x
  2. Step 2: Convert to fraction form
    281,203.01/388,067.76 = 172,305.45/x
  3. Step 3: Cross multiply
    281,203.01x = 388,067.76 × 172,305.45
  4. Step 4: Simplify right side
    281,203.01x = 66,866,190,017.29
  5. Step 5: Solve for x
    x = 66,866,190,017.29/281,203.01
  6. Step 6: Final answer
    x = 237,786.19

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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.