Home / 223,965.97-309,070.40-121,991.11

Finding the Fourth Proportional to 223,965.97, 309,070.40 and 121,991.11

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Solution

The fourth proportional to 223,965.97, 309,070.40 and 121,991.11 is: 168,346.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,965.97 : 309,070.40 = 121,991.11 : x
  2. Step 2: Convert to fraction form
    223,965.97/309,070.40 = 121,991.11/x
  3. Step 3: Cross multiply
    223,965.97x = 309,070.40 × 121,991.11
  4. Step 4: Simplify right side
    223,965.97x = 37,703,839,781.51
  5. Step 5: Solve for x
    x = 37,703,839,781.51/223,965.97
  6. Step 6: Final answer
    x = 168,346.29

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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.