Home / 80,954.20-121,409.70-28,358.20

Finding the Fourth Proportional to 80,954.20, 121,409.70 and 28,358.20

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Solution

The fourth proportional to 80,954.20, 121,409.70 and 28,358.20 is: 42,529.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.20 : 121,409.70 = 28,358.20 : x
  2. Step 2: Convert to fraction form
    80,954.20/121,409.70 = 28,358.20/x
  3. Step 3: Cross multiply
    80,954.20x = 121,409.70 × 28,358.20
  4. Step 4: Simplify right side
    80,954.20x = 3,442,960,554.54
  5. Step 5: Solve for x
    x = 3,442,960,554.54/80,954.20
  6. Step 6: Final answer
    x = 42,529.73

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1.5x scale

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.