Home / 213,615.50-320,445.18-80,607.69

Finding the Fourth Proportional to 213,615.50, 320,445.18 and 80,607.69

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Solution

The fourth proportional to 213,615.50, 320,445.18 and 80,607.69 is: 120,919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,615.50 : 320,445.18 = 80,607.69 : x
  2. Step 2: Convert to fraction form
    213,615.50/320,445.18 = 80,607.69/x
  3. Step 3: Cross multiply
    213,615.50x = 320,445.18 × 80,607.69
  4. Step 4: Simplify right side
    213,615.50x = 25,830,345,731.43
  5. Step 5: Solve for x
    x = 25,830,345,731.43/213,615.50
  6. Step 6: Final answer
    x = 120,919.81

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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.