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Finding the Fourth Proportional to 206,965.60, 310,371.60 and 82,280.80

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Solution

The fourth proportional to 206,965.60, 310,371.60 and 82,280.80 is: 123,390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,965.60 : 310,371.60 = 82,280.80 : x
  2. Step 2: Convert to fraction form
    206,965.60/310,371.60 = 82,280.80/x
  3. Step 3: Cross multiply
    206,965.60x = 310,371.60 × 82,280.80
  4. Step 4: Simplify right side
    206,965.60x = 25,537,623,545.28
  5. Step 5: Solve for x
    x = 25,537,623,545.28/206,965.60
  6. Step 6: Final answer
    x = 123,390.67

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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.