Home / 221,720.14-305,973.81-121,118.14

Finding the Fourth Proportional to 221,720.14, 305,973.81 and 121,118.14

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Solution

The fourth proportional to 221,720.14, 305,973.81 and 121,118.14 is: 167,143.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,720.14 : 305,973.81 = 121,118.14 : x
  2. Step 2: Convert to fraction form
    221,720.14/305,973.81 = 121,118.14/x
  3. Step 3: Cross multiply
    221,720.14x = 305,973.81 × 121,118.14
  4. Step 4: Simplify right side
    221,720.14x = 37,058,976,620.45
  5. Step 5: Solve for x
    x = 37,058,976,620.45/221,720.14
  6. Step 6: Final answer
    x = 167,143.04

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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.