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Finding the Fourth Proportional to 68,808.40, 94,959.40 and 51,782

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Solution

The fourth proportional to 68,808.40, 94,959.40 and 51,782 is: 71,462.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,808.40 : 94,959.40 = 51,782 : x
  2. Step 2: Convert to fraction form
    68,808.40/94,959.40 = 51,782/x
  3. Step 3: Cross multiply
    68,808.40x = 94,959.40 × 51,782
  4. Step 4: Simplify right side
    68,808.40x = 4,917,187,650.80
  5. Step 5: Solve for x
    x = 4,917,187,650.80/68,808.40
  6. Step 6: Final answer
    x = 71,462.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.