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Finding the Fourth Proportional to 213,950.39, 320,992.72 and 128,659.41

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Solution

The fourth proportional to 213,950.39, 320,992.72 and 128,659.41 is: 193,029.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,950.39 : 320,992.72 = 128,659.41 : x
  2. Step 2: Convert to fraction form
    213,950.39/320,992.72 = 128,659.41/x
  3. Step 3: Cross multiply
    213,950.39x = 320,992.72 × 128,659.41
  4. Step 4: Simplify right side
    213,950.39x = 41,298,733,647.85
  5. Step 5: Solve for x
    x = 41,298,733,647.85/213,950.39
  6. Step 6: Final answer
    x = 193,029.49

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1.5x scale

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.