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Finding the Fourth Proportional to 254,039.39, 381,059.75 and 85,677.98

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Solution

The fourth proportional to 254,039.39, 381,059.75 and 85,677.98 is: 128,517.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,039.39 : 381,059.75 = 85,677.98 : x
  2. Step 2: Convert to fraction form
    254,039.39/381,059.75 = 85,677.98/x
  3. Step 3: Cross multiply
    254,039.39x = 381,059.75 × 85,677.98
  4. Step 4: Simplify right side
    254,039.39x = 32,648,427,305.62
  5. Step 5: Solve for x
    x = 32,648,427,305.62/254,039.39
  6. Step 6: Final answer
    x = 128,517.19

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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.