Home / 420,845.45-631,356.84-136,513.80

Finding the Fourth Proportional to 420,845.45, 631,356.84 and 136,513.80

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Solution

The fourth proportional to 420,845.45, 631,356.84 and 136,513.80 is: 204,799.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,845.45 : 631,356.84 = 136,513.80 : x
  2. Step 2: Convert to fraction form
    420,845.45/631,356.84 = 136,513.80/x
  3. Step 3: Cross multiply
    420,845.45x = 631,356.84 × 136,513.80
  4. Step 4: Simplify right side
    420,845.45x = 86,188,921,888.29
  5. Step 5: Solve for x
    x = 86,188,921,888.29/420,845.45
  6. Step 6: Final answer
    x = 204,799.46

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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.