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Finding the Fourth Proportional to 100,443.51, 150,661.62 and 30,321

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Solution

The fourth proportional to 100,443.51, 150,661.62 and 30,321 is: 45,480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,443.51 : 150,661.62 = 30,321 : x
  2. Step 2: Convert to fraction form
    100,443.51/150,661.62 = 30,321/x
  3. Step 3: Cross multiply
    100,443.51x = 150,661.62 × 30,321
  4. Step 4: Simplify right side
    100,443.51x = 4,568,210,980.02
  5. Step 5: Solve for x
    x = 4,568,210,980.02/100,443.51
  6. Step 6: Final answer
    x = 45,480.40

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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.