Home / 218,843.11-302,078.83-128,228.41

Finding the Fourth Proportional to 218,843.11, 302,078.83 and 128,228.41

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Solution

The fourth proportional to 218,843.11, 302,078.83 and 128,228.41 is: 176,999.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,843.11 : 302,078.83 = 128,228.41 : x
  2. Step 2: Convert to fraction form
    218,843.11/302,078.83 = 128,228.41/x
  3. Step 3: Cross multiply
    218,843.11x = 302,078.83 × 128,228.41
  4. Step 4: Simplify right side
    218,843.11x = 38,735,086,989.79
  5. Step 5: Solve for x
    x = 38,735,086,989.79/218,843.11
  6. Step 6: Final answer
    x = 176,999.35

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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.