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Finding the Fourth Proportional to 68,678.30, 94,737.36 and 39,994.58

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Solution

The fourth proportional to 68,678.30, 94,737.36 and 39,994.58 is: 55,169.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,678.30 : 94,737.36 = 39,994.58 : x
  2. Step 2: Convert to fraction form
    68,678.30/94,737.36 = 39,994.58/x
  3. Step 3: Cross multiply
    68,678.30x = 94,737.36 × 39,994.58
  4. Step 4: Simplify right side
    68,678.30x = 3,788,981,160.35
  5. Step 5: Solve for x
    x = 3,788,981,160.35/68,678.30
  6. Step 6: Final answer
    x = 55,169.99

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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.