Home / 320,212.80-479,930.40-142,531.20

Finding the Fourth Proportional to 320,212.80, 479,930.40 and 142,531.20

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Solution

The fourth proportional to 320,212.80, 479,930.40 and 142,531.20 is: 213,623.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,212.80 : 479,930.40 = 142,531.20 : x
  2. Step 2: Convert to fraction form
    320,212.80/479,930.40 = 142,531.20/x
  3. Step 3: Cross multiply
    320,212.80x = 479,930.40 × 142,531.20
  4. Step 4: Simplify right side
    320,212.80x = 68,405,055,828.48
  5. Step 5: Solve for x
    x = 68,405,055,828.48/320,212.80
  6. Step 6: Final answer
    x = 213,623.74

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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.