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Finding the Fourth Proportional to 219,809.62, 303,357.43 and 138,151.15

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Solution

The fourth proportional to 219,809.62, 303,357.43 and 138,151.15 is: 190,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,809.62 : 303,357.43 = 138,151.15 : x
  2. Step 2: Convert to fraction form
    219,809.62/303,357.43 = 138,151.15/x
  3. Step 3: Cross multiply
    219,809.62x = 303,357.43 × 138,151.15
  4. Step 4: Simplify right side
    219,809.62x = 41,909,177,815.54
  5. Step 5: Solve for x
    x = 41,909,177,815.54/219,809.62
  6. Step 6: Final answer
    x = 190,661.25

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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.