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Finding the Fourth Proportional to 68,990.42, 103,411.95 and 39,344.42

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Solution

The fourth proportional to 68,990.42, 103,411.95 and 39,344.42 is: 58,974.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.42 : 103,411.95 = 39,344.42 : x
  2. Step 2: Convert to fraction form
    68,990.42/103,411.95 = 39,344.42/x
  3. Step 3: Cross multiply
    68,990.42x = 103,411.95 × 39,344.42
  4. Step 4: Simplify right side
    68,990.42x = 4,068,683,193.82
  5. Step 5: Solve for x
    x = 4,068,683,193.82/68,990.42
  6. Step 6: Final answer
    x = 58,974.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.