Home / 420,989.36-631,567.06-136,626.88

Finding the Fourth Proportional to 420,989.36, 631,567.06 and 136,626.88

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Solution

The fourth proportional to 420,989.36, 631,567.06 and 136,626.88 is: 204,967.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,989.36 : 631,567.06 = 136,626.88 : x
  2. Step 2: Convert to fraction form
    420,989.36/631,567.06 = 136,626.88/x
  3. Step 3: Cross multiply
    420,989.36x = 631,567.06 × 136,626.88
  4. Step 4: Simplify right side
    420,989.36x = 86,289,036,918.57
  5. Step 5: Solve for x
    x = 86,289,036,918.57/420,989.36
  6. Step 6: Final answer
    x = 204,967.26

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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.