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Finding the Fourth Proportional to 100,615.91, 150,945.65 and 30,500.51

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Solution

The fourth proportional to 100,615.91, 150,945.65 and 30,500.51 is: 45,757.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,615.91 : 150,945.65 = 30,500.51 : x
  2. Step 2: Convert to fraction form
    100,615.91/150,945.65 = 30,500.51/x
  3. Step 3: Cross multiply
    100,615.91x = 150,945.65 × 30,500.51
  4. Step 4: Simplify right side
    100,615.91x = 4,603,919,307.28
  5. Step 5: Solve for x
    x = 4,603,919,307.28/100,615.91
  6. Step 6: Final answer
    x = 45,757.37

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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.