Home / 206,131.19-309,188.69-86,157.15

Finding the Fourth Proportional to 206,131.19, 309,188.69 and 86,157.15

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Solution

The fourth proportional to 206,131.19, 309,188.69 and 86,157.15 is: 129,232.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,131.19 : 309,188.69 = 86,157.15 : x
  2. Step 2: Convert to fraction form
    206,131.19/309,188.69 = 86,157.15/x
  3. Step 3: Cross multiply
    206,131.19x = 309,188.69 × 86,157.15
  4. Step 4: Simplify right side
    206,131.19x = 26,638,815,911.85
  5. Step 5: Solve for x
    x = 26,638,815,911.85/206,131.19
  6. Step 6: Final answer
    x = 129,232.34

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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.