Home / 223,942.20-309,034.89-128,442.80

Finding the Fourth Proportional to 223,942.20, 309,034.89 and 128,442.80

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Solution

The fourth proportional to 223,942.20, 309,034.89 and 128,442.80 is: 177,247.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,942.20 : 309,034.89 = 128,442.80 : x
  2. Step 2: Convert to fraction form
    223,942.20/309,034.89 = 128,442.80/x
  3. Step 3: Cross multiply
    223,942.20x = 309,034.89 × 128,442.80
  4. Step 4: Simplify right side
    223,942.20x = 39,693,305,024.12
  5. Step 5: Solve for x
    x = 39,693,305,024.12/223,942.20
  6. Step 6: Final answer
    x = 177,247.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.