Home / 321,743.63-482,618.27-81,857.75

Finding the Fourth Proportional to 321,743.63, 482,618.27 and 81,857.75

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Solution

The fourth proportional to 321,743.63, 482,618.27 and 81,857.75 is: 122,787.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,743.63 : 482,618.27 = 81,857.75 : x
  2. Step 2: Convert to fraction form
    321,743.63/482,618.27 = 81,857.75/x
  3. Step 3: Cross multiply
    321,743.63x = 482,618.27 × 81,857.75
  4. Step 4: Simplify right side
    321,743.63x = 39,506,042,868.71
  5. Step 5: Solve for x
    x = 39,506,042,868.71/321,743.63
  6. Step 6: Final answer
    x = 122,787.33

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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.