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Finding the Fourth Proportional to 245,441.85, 338,703.01 and 138,009.12

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Solution

The fourth proportional to 245,441.85, 338,703.01 and 138,009.12 is: 190,448.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,441.85 : 338,703.01 = 138,009.12 : x
  2. Step 2: Convert to fraction form
    245,441.85/338,703.01 = 138,009.12/x
  3. Step 3: Cross multiply
    245,441.85x = 338,703.01 × 138,009.12
  4. Step 4: Simplify right side
    245,441.85x = 46,744,104,351.45
  5. Step 5: Solve for x
    x = 46,744,104,351.45/245,441.85
  6. Step 6: Final answer
    x = 190,448.79

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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.