Home / 210,621.28-290,624.88-121,180

Finding the Fourth Proportional to 210,621.28, 290,624.88 and 121,180

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Solution

The fourth proportional to 210,621.28, 290,624.88 and 121,180 is: 167,209.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,621.28 : 290,624.88 = 121,180 : x
  2. Step 2: Convert to fraction form
    210,621.28/290,624.88 = 121,180/x
  3. Step 3: Cross multiply
    210,621.28x = 290,624.88 × 121,180
  4. Step 4: Simplify right side
    210,621.28x = 35,217,922,958.40
  5. Step 5: Solve for x
    x = 35,217,922,958.40/210,621.28
  6. Step 6: Final answer
    x = 167,209.71

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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.