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Finding the Fourth Proportional to 254,198.88, 381,201.21 and 85,673.93

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Solution

The fourth proportional to 254,198.88, 381,201.21 and 85,673.93 is: 128,478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,198.88 : 381,201.21 = 85,673.93 : x
  2. Step 2: Convert to fraction form
    254,198.88/381,201.21 = 85,673.93/x
  3. Step 3: Cross multiply
    254,198.88x = 381,201.21 × 85,673.93
  4. Step 4: Simplify right side
    254,198.88x = 32,659,003,875.45
  5. Step 5: Solve for x
    x = 32,659,003,875.45/254,198.88
  6. Step 6: Final answer
    x = 128,478.16

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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.