Home / 80,968.06-121,438.32-21,790.54

Finding the Fourth Proportional to 80,968.06, 121,438.32 and 21,790.54

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Solution

The fourth proportional to 80,968.06, 121,438.32 and 21,790.54 is: 32,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968.06 : 121,438.32 = 21,790.54 : x
  2. Step 2: Convert to fraction form
    80,968.06/121,438.32 = 21,790.54/x
  3. Step 3: Cross multiply
    80,968.06x = 121,438.32 × 21,790.54
  4. Step 4: Simplify right side
    80,968.06x = 2,646,206,569.49
  5. Step 5: Solve for x
    x = 2,646,206,569.49/80,968.06
  6. Step 6: Final answer
    x = 32,682.10

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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.