Home / 206,619.40-309,899.67-66,359.80

Finding the Fourth Proportional to 206,619.40, 309,899.67 and 66,359.80

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Solution

The fourth proportional to 206,619.40, 309,899.67 and 66,359.80 is: 99,530.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,619.40 : 309,899.67 = 66,359.80 : x
  2. Step 2: Convert to fraction form
    206,619.40/309,899.67 = 66,359.80/x
  3. Step 3: Cross multiply
    206,619.40x = 309,899.67 × 66,359.80
  4. Step 4: Simplify right side
    206,619.40x = 20,564,880,121.27
  5. Step 5: Solve for x
    x = 20,564,880,121.27/206,619.40
  6. Step 6: Final answer
    x = 99,530.25

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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.