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Finding the Fourth Proportional to 68,081.31, 93,953.52 and 39,803.40

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Solution

The fourth proportional to 68,081.31, 93,953.52 and 39,803.40 is: 54,929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,081.31 : 93,953.52 = 39,803.40 : x
  2. Step 2: Convert to fraction form
    68,081.31/93,953.52 = 39,803.40/x
  3. Step 3: Cross multiply
    68,081.31x = 93,953.52 × 39,803.40
  4. Step 4: Simplify right side
    68,081.31x = 3,739,669,537.97
  5. Step 5: Solve for x
    x = 3,739,669,537.97/68,081.31
  6. Step 6: Final answer
    x = 54,929.46

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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.