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Finding the Fourth Proportional to 68,298, 94,251.96 and 38,490

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Solution

The fourth proportional to 68,298, 94,251.96 and 38,490 is: 53,116.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,298 : 94,251.96 = 38,490 : x
  2. Step 2: Convert to fraction form
    68,298/94,251.96 = 38,490/x
  3. Step 3: Cross multiply
    68,298x = 94,251.96 × 38,490
  4. Step 4: Simplify right side
    68,298x = 3,627,757,940.40
  5. Step 5: Solve for x
    x = 3,627,757,940.40/68,298
  6. Step 6: Final answer
    x = 53,116.61

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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.