Home / 221,721.17-305,974.73-121,119.17

Finding the Fourth Proportional to 221,721.17, 305,974.73 and 121,119.17

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Solution

The fourth proportional to 221,721.17, 305,974.73 and 121,119.17 is: 167,144.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,721.17 : 305,974.73 = 121,119.17 : x
  2. Step 2: Convert to fraction form
    221,721.17/305,974.73 = 121,119.17/x
  3. Step 3: Cross multiply
    221,721.17x = 305,974.73 × 121,119.17
  4. Step 4: Simplify right side
    221,721.17x = 37,059,404,111.50
  5. Step 5: Solve for x
    x = 37,059,404,111.50/221,721.17
  6. Step 6: Final answer
    x = 167,144.19

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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.