Home / 420,853.26-631,368.55-136,521.61

Finding the Fourth Proportional to 420,853.26, 631,368.55 and 136,521.61

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Solution

The fourth proportional to 420,853.26, 631,368.55 and 136,521.61 is: 204,811.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,853.26 : 631,368.55 = 136,521.61 : x
  2. Step 2: Convert to fraction form
    420,853.26/631,368.55 = 136,521.61/x
  3. Step 3: Cross multiply
    420,853.26x = 631,368.55 × 136,521.61
  4. Step 4: Simplify right side
    420,853.26x = 86,195,450,949.37
  5. Step 5: Solve for x
    x = 86,195,450,949.37/420,853.26
  6. Step 6: Final answer
    x = 204,811.18

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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.