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Finding the Fourth Proportional to 245,450.11, 338,723.18 and 138,019.21

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Solution

The fourth proportional to 245,450.11, 338,723.18 and 138,019.21 is: 190,467.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,450.11 : 338,723.18 = 138,019.21 : x
  2. Step 2: Convert to fraction form
    245,450.11/338,723.18 = 138,019.21/x
  3. Step 3: Cross multiply
    245,450.11x = 338,723.18 × 138,019.21
  4. Step 4: Simplify right side
    245,450.11x = 46,750,305,712.29
  5. Step 5: Solve for x
    x = 46,750,305,712.29/245,450.11
  6. Step 6: Final answer
    x = 190,467.65

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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.