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Finding the Fourth Proportional to 265,768.15, 398,692.39 and 85,793.44

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Solution

The fourth proportional to 265,768.15, 398,692.39 and 85,793.44 is: 128,703.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,768.15 : 398,692.39 = 85,793.44 : x
  2. Step 2: Convert to fraction form
    265,768.15/398,692.39 = 85,793.44/x
  3. Step 3: Cross multiply
    265,768.15x = 398,692.39 × 85,793.44
  4. Step 4: Simplify right side
    265,768.15x = 34,205,191,425.44
  5. Step 5: Solve for x
    x = 34,205,191,425.44/265,768.15
  6. Step 6: Final answer
    x = 128,703.12

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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.