Home / 420,983.91-631,518.39-136,662.57

Finding the Fourth Proportional to 420,983.91, 631,518.39 and 136,662.57

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Solution

The fourth proportional to 420,983.91, 631,518.39 and 136,662.57 is: 205,007.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,983.91 : 631,518.39 = 136,662.57 : x
  2. Step 2: Convert to fraction form
    420,983.91/631,518.39 = 136,662.57/x
  3. Step 3: Cross multiply
    420,983.91x = 631,518.39 × 136,662.57
  4. Step 4: Simplify right side
    420,983.91x = 86,304,926,179.66
  5. Step 5: Solve for x
    x = 86,304,926,179.66/420,983.91
  6. Step 6: Final answer
    x = 205,007.66

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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.