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Finding the Fourth Proportional to 100,401.12, 150,305.78 and 87,945.48

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Solution

The fourth proportional to 100,401.12, 150,305.78 and 87,945.48 is: 131,659.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,401.12 : 150,305.78 = 87,945.48 : x
  2. Step 2: Convert to fraction form
    100,401.12/150,305.78 = 87,945.48/x
  3. Step 3: Cross multiply
    100,401.12x = 150,305.78 × 87,945.48
  4. Step 4: Simplify right side
    100,401.12x = 13,218,713,968.87
  5. Step 5: Solve for x
    x = 13,218,713,968.87/100,401.12
  6. Step 6: Final answer
    x = 131,659.03

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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.