Home / 83,619.20-125,428.08-21,289.60

Finding the Fourth Proportional to 83,619.20, 125,428.08 and 21,289.60

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Solution

The fourth proportional to 83,619.20, 125,428.08 and 21,289.60 is: 31,934.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,619.20 : 125,428.08 = 21,289.60 : x
  2. Step 2: Convert to fraction form
    83,619.20/125,428.08 = 21,289.60/x
  3. Step 3: Cross multiply
    83,619.20x = 125,428.08 × 21,289.60
  4. Step 4: Simplify right side
    83,619.20x = 2,670,313,651.97
  5. Step 5: Solve for x
    x = 2,670,313,651.97/83,619.20
  6. Step 6: Final answer
    x = 31,934.22

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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.