Home / 80,718.66-121,078.26-39,136.50

Finding the Fourth Proportional to 80,718.66, 121,078.26 and 39,136.50

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Solution

The fourth proportional to 80,718.66, 121,078.26 and 39,136.50 is: 58,704.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,718.66 : 121,078.26 = 39,136.50 : x
  2. Step 2: Convert to fraction form
    80,718.66/121,078.26 = 39,136.50/x
  3. Step 3: Cross multiply
    80,718.66x = 121,078.26 × 39,136.50
  4. Step 4: Simplify right side
    80,718.66x = 4,738,579,322.49
  5. Step 5: Solve for x
    x = 4,738,579,322.49/80,718.66
  6. Step 6: Final answer
    x = 58,704.88

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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.