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Finding the Fourth Proportional to 68,621.58, 94,689.81 and 38,408.58

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Solution

The fourth proportional to 68,621.58, 94,689.81 and 38,408.58 is: 52,999.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,621.58 : 94,689.81 = 38,408.58 : x
  2. Step 2: Convert to fraction form
    68,621.58/94,689.81 = 38,408.58/x
  3. Step 3: Cross multiply
    68,621.58x = 94,689.81 × 38,408.58
  4. Step 4: Simplify right side
    68,621.58x = 3,636,901,142.57
  5. Step 5: Solve for x
    x = 3,636,901,142.57/68,621.58
  6. Step 6: Final answer
    x = 52,999.38

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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.