Home / 83,620.20-125,429.58-21,290.60

Finding the Fourth Proportional to 83,620.20, 125,429.58 and 21,290.60

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Solution

The fourth proportional to 83,620.20, 125,429.58 and 21,290.60 is: 31,935.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.20 : 125,429.58 = 21,290.60 : x
  2. Step 2: Convert to fraction form
    83,620.20/125,429.58 = 21,290.60/x
  3. Step 3: Cross multiply
    83,620.20x = 125,429.58 × 21,290.60
  4. Step 4: Simplify right side
    83,620.20x = 2,670,471,015.95
  5. Step 5: Solve for x
    x = 2,670,471,015.95/83,620.20
  6. Step 6: Final answer
    x = 31,935.72

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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.