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Finding the Fourth Proportional to 68,708.80, 103,063.20 and 61,929.10

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Solution

The fourth proportional to 68,708.80, 103,063.20 and 61,929.10 is: 92,893.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.80 : 103,063.20 = 61,929.10 : x
  2. Step 2: Convert to fraction form
    68,708.80/103,063.20 = 61,929.10/x
  3. Step 3: Cross multiply
    68,708.80x = 103,063.20 × 61,929.10
  4. Step 4: Simplify right side
    68,708.80x = 6,382,611,219.12
  5. Step 5: Solve for x
    x = 6,382,611,219.12/68,708.80
  6. Step 6: Final answer
    x = 92,893.65

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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.