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Finding the Fourth Proportional to 204,995.80, 307,401.36 and 86,606.20

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Solution

The fourth proportional to 204,995.80, 307,401.36 and 86,606.20 is: 129,870.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,995.80 : 307,401.36 = 86,606.20 : x
  2. Step 2: Convert to fraction form
    204,995.80/307,401.36 = 86,606.20/x
  3. Step 3: Cross multiply
    204,995.80x = 307,401.36 × 86,606.20
  4. Step 4: Simplify right side
    204,995.80x = 26,622,863,664.43
  5. Step 5: Solve for x
    x = 26,622,863,664.43/204,995.80
  6. Step 6: Final answer
    x = 129,870.29

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1.5x scale

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.