Home / 223,135.31-307,921.55-121,161.03

Finding the Fourth Proportional to 223,135.31, 307,921.55 and 121,161.03

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Solution

The fourth proportional to 223,135.31, 307,921.55 and 121,161.03 is: 167,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,135.31 : 307,921.55 = 121,161.03 : x
  2. Step 2: Convert to fraction form
    223,135.31/307,921.55 = 121,161.03/x
  3. Step 3: Cross multiply
    223,135.31x = 307,921.55 × 121,161.03
  4. Step 4: Simplify right side
    223,135.31x = 37,308,091,551.39
  5. Step 5: Solve for x
    x = 37,308,091,551.39/223,135.31
  6. Step 6: Final answer
    x = 167,199.41

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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.