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Finding the Fourth Proportional to 203,809.03, 305,614.79 and 85,448.59

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Solution

The fourth proportional to 203,809.03, 305,614.79 and 85,448.59 is: 128,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,809.03 : 305,614.79 = 85,448.59 : x
  2. Step 2: Convert to fraction form
    203,809.03/305,614.79 = 85,448.59/x
  3. Step 3: Cross multiply
    203,809.03x = 305,614.79 × 85,448.59
  4. Step 4: Simplify right side
    203,809.03x = 26,114,352,888.65
  5. Step 5: Solve for x
    x = 26,114,352,888.65/203,809.03
  6. Step 6: Final answer
    x = 128,131.48

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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.