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Finding the Fourth Proportional to 254,416.88, 381,669.31 and 85,938.44

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Solution

The fourth proportional to 254,416.88, 381,669.31 and 85,938.44 is: 128,922.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,416.88 : 381,669.31 = 85,938.44 : x
  2. Step 2: Convert to fraction form
    254,416.88/381,669.31 = 85,938.44/x
  3. Step 3: Cross multiply
    254,416.88x = 381,669.31 × 85,938.44
  4. Step 4: Simplify right side
    254,416.88x = 32,800,063,296.35
  5. Step 5: Solve for x
    x = 32,800,063,296.35/254,416.88
  6. Step 6: Final answer
    x = 128,922.51

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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.