Home / 213,830.55-320,817.09-71,689.89

Finding the Fourth Proportional to 213,830.55, 320,817.09 and 71,689.89

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Solution

The fourth proportional to 213,830.55, 320,817.09 and 71,689.89 is: 107,558.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,830.55 : 320,817.09 = 71,689.89 : x
  2. Step 2: Convert to fraction form
    213,830.55/320,817.09 = 71,689.89/x
  3. Step 3: Cross multiply
    213,830.55x = 320,817.09 × 71,689.89
  4. Step 4: Simplify right side
    213,830.55x = 22,999,341,892.22
  5. Step 5: Solve for x
    x = 22,999,341,892.22/213,830.55
  6. Step 6: Final answer
    x = 107,558.73

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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.