Home / 218,118.62-300,999.36-121,320.38

Finding the Fourth Proportional to 218,118.62, 300,999.36 and 121,320.38

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Solution

The fourth proportional to 218,118.62, 300,999.36 and 121,320.38 is: 167,419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,118.62 : 300,999.36 = 121,320.38 : x
  2. Step 2: Convert to fraction form
    218,118.62/300,999.36 = 121,320.38/x
  3. Step 3: Cross multiply
    218,118.62x = 300,999.36 × 121,320.38
  4. Step 4: Simplify right side
    218,118.62x = 36,517,356,734.96
  5. Step 5: Solve for x
    x = 36,517,356,734.96/218,118.62
  6. Step 6: Final answer
    x = 167,419.71

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1.5x scale

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.