Home / 82,585.28-123,880.26-20,255.72

Finding the Fourth Proportional to 82,585.28, 123,880.26 and 20,255.72

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Solution

The fourth proportional to 82,585.28, 123,880.26 and 20,255.72 is: 30,384.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,585.28 : 123,880.26 = 20,255.72 : x
  2. Step 2: Convert to fraction form
    82,585.28/123,880.26 = 20,255.72/x
  3. Step 3: Cross multiply
    82,585.28x = 123,880.26 × 20,255.72
  4. Step 4: Simplify right side
    82,585.28x = 2,509,283,860.09
  5. Step 5: Solve for x
    x = 2,509,283,860.09/82,585.28
  6. Step 6: Final answer
    x = 30,384.15

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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.