Home / 213,403.09-320,148.83-87,043.69

Finding the Fourth Proportional to 213,403.09, 320,148.83 and 87,043.69

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Solution

The fourth proportional to 213,403.09, 320,148.83 and 87,043.69 is: 130,583.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,403.09 : 320,148.83 = 87,043.69 : x
  2. Step 2: Convert to fraction form
    213,403.09/320,148.83 = 87,043.69/x
  3. Step 3: Cross multiply
    213,403.09x = 320,148.83 × 87,043.69
  4. Step 4: Simplify right side
    213,403.09x = 27,866,933,476.42
  5. Step 5: Solve for x
    x = 27,866,933,476.42/213,403.09
  6. Step 6: Final answer
    x = 130,583.55

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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.