Home / 218,844.11-302,080.21-128,229.41

Finding the Fourth Proportional to 218,844.11, 302,080.21 and 128,229.41

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Solution

The fourth proportional to 218,844.11, 302,080.21 and 128,229.41 is: 177,000.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,844.11 : 302,080.21 = 128,229.41 : x
  2. Step 2: Convert to fraction form
    218,844.11/302,080.21 = 128,229.41/x
  3. Step 3: Cross multiply
    218,844.11x = 302,080.21 × 128,229.41
  4. Step 4: Simplify right side
    218,844.11x = 38,735,567,100.98
  5. Step 5: Solve for x
    x = 38,735,567,100.98/218,844.11
  6. Step 6: Final answer
    x = 177,000.73

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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.