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Finding the Fourth Proportional to 205,514.70, 308,199.15 and 72,399.30

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Solution

The fourth proportional to 205,514.70, 308,199.15 and 72,399.30 is: 108,573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,514.70 : 308,199.15 = 72,399.30 : x
  2. Step 2: Convert to fraction form
    205,514.70/308,199.15 = 72,399.30/x
  3. Step 3: Cross multiply
    205,514.70x = 308,199.15 × 72,399.30
  4. Step 4: Simplify right side
    205,514.70x = 22,313,402,720.60
  5. Step 5: Solve for x
    x = 22,313,402,720.60/205,514.70
  6. Step 6: Final answer
    x = 108,573.27

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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.