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Finding the Fourth Proportional to 213,785.38, 320,733.39 and 80,666.77

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Solution

The fourth proportional to 213,785.38, 320,733.39 and 80,666.77 is: 121,021.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,785.38 : 320,733.39 = 80,666.77 : x
  2. Step 2: Convert to fraction form
    213,785.38/320,733.39 = 80,666.77/x
  3. Step 3: Cross multiply
    213,785.38x = 320,733.39 × 80,666.77
  4. Step 4: Simplify right side
    213,785.38x = 25,872,526,602.45
  5. Step 5: Solve for x
    x = 25,872,526,602.45/213,785.38
  6. Step 6: Final answer
    x = 121,021.03

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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.