Home / 420,986.66-631,579.60-136,676.66

Finding the Fourth Proportional to 420,986.66, 631,579.60 and 136,676.66

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Solution

The fourth proportional to 420,986.66, 631,579.60 and 136,676.66 is: 205,047.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,986.66 : 631,579.60 = 136,676.66 : x
  2. Step 2: Convert to fraction form
    420,986.66/631,579.60 = 136,676.66/x
  3. Step 3: Cross multiply
    420,986.66x = 631,579.60 × 136,676.66
  4. Step 4: Simplify right side
    420,986.66x = 86,322,190,252.14
  5. Step 5: Solve for x
    x = 86,322,190,252.14/420,986.66
  6. Step 6: Final answer
    x = 205,047.33

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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.