Home / 209,497.09-289,137.12-123,428.56

Finding the Fourth Proportional to 209,497.09, 289,137.12 and 123,428.56

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Solution

The fourth proportional to 209,497.09, 289,137.12 and 123,428.56 is: 170,349.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,497.09 : 289,137.12 = 123,428.56 : x
  2. Step 2: Convert to fraction form
    209,497.09/289,137.12 = 123,428.56/x
  3. Step 3: Cross multiply
    209,497.09x = 289,137.12 × 123,428.56
  4. Step 4: Simplify right side
    209,497.09x = 35,687,777,152.88
  5. Step 5: Solve for x
    x = 35,687,777,152.88/209,497.09
  6. Step 6: Final answer
    x = 170,349.75

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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.