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Finding the Fourth Proportional to 84,690.98, 127,015.20 and 34,784.85

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Solution

The fourth proportional to 84,690.98, 127,015.20 and 34,784.85 is: 52,168.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,690.98 : 127,015.20 = 34,784.85 : x
  2. Step 2: Convert to fraction form
    84,690.98/127,015.20 = 34,784.85/x
  3. Step 3: Cross multiply
    84,690.98x = 127,015.20 × 34,784.85
  4. Step 4: Simplify right side
    84,690.98x = 4,418,204,700.96
  5. Step 5: Solve for x
    x = 4,418,204,700.96/84,690.98
  6. Step 6: Final answer
    x = 52,168.54

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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.