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Finding the Fourth Proportional to 200,112.48, 300,019.68 and 121,207.68

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Solution

The fourth proportional to 200,112.48, 300,019.68 and 121,207.68 is: 181,721.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,112.48 : 300,019.68 = 121,207.68 : x
  2. Step 2: Convert to fraction form
    200,112.48/300,019.68 = 121,207.68/x
  3. Step 3: Cross multiply
    200,112.48x = 300,019.68 × 121,207.68
  4. Step 4: Simplify right side
    200,112.48x = 36,364,689,367.14
  5. Step 5: Solve for x
    x = 36,364,689,367.14/200,112.48
  6. Step 6: Final answer
    x = 181,721.25

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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.