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Finding the Fourth Proportional to 254,418.39, 381,671.56 and 85,939.94

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Solution

The fourth proportional to 254,418.39, 381,671.56 and 85,939.94 is: 128,924.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,418.39 : 381,671.56 = 85,939.94 : x
  2. Step 2: Convert to fraction form
    254,418.39/381,671.56 = 85,939.94/x
  3. Step 3: Cross multiply
    254,418.39x = 381,671.56 × 85,939.94
  4. Step 4: Simplify right side
    254,418.39x = 32,800,830,966.11
  5. Step 5: Solve for x
    x = 32,800,830,966.11/254,418.39
  6. Step 6: Final answer
    x = 128,924.76

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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.