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Finding the Fourth Proportional to 254,129.85, 381,229.95 and 85,698.33

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Solution

The fourth proportional to 254,129.85, 381,229.95 and 85,698.33 is: 128,559.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,129.85 : 381,229.95 = 85,698.33 : x
  2. Step 2: Convert to fraction form
    254,129.85/381,229.95 = 85,698.33/x
  3. Step 3: Cross multiply
    254,129.85x = 381,229.95 × 85,698.33
  4. Step 4: Simplify right side
    254,129.85x = 32,670,770,060.98
  5. Step 5: Solve for x
    x = 32,670,770,060.98/254,129.85
  6. Step 6: Final answer
    x = 128,559.36

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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.