Home / 80,818.35-121,101.78-30,871.20

Finding the Fourth Proportional to 80,818.35, 121,101.78 and 30,871.20

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Solution

The fourth proportional to 80,818.35, 121,101.78 and 30,871.20 is: 46,258.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,818.35 : 121,101.78 = 30,871.20 : x
  2. Step 2: Convert to fraction form
    80,818.35/121,101.78 = 30,871.20/x
  3. Step 3: Cross multiply
    80,818.35x = 121,101.78 × 30,871.20
  4. Step 4: Simplify right side
    80,818.35x = 3,738,557,270.74
  5. Step 5: Solve for x
    x = 3,738,557,270.74/80,818.35
  6. Step 6: Final answer
    x = 46,258.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.