Home / 213,736.72-320,486.64-87,465.60

Finding the Fourth Proportional to 213,736.72, 320,486.64 and 87,465.60

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Solution

The fourth proportional to 213,736.72, 320,486.64 and 87,465.60 is: 131,149.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,736.72 : 320,486.64 = 87,465.60 : x
  2. Step 2: Convert to fraction form
    213,736.72/320,486.64 = 87,465.60/x
  3. Step 3: Cross multiply
    213,736.72x = 320,486.64 × 87,465.60
  4. Step 4: Simplify right side
    213,736.72x = 28,031,556,259.58
  5. Step 5: Solve for x
    x = 28,031,556,259.58/213,736.72
  6. Step 6: Final answer
    x = 131,149.93

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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.