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Finding the Fourth Proportional to 68,981.87, 103,416.36 and 35,711.43

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Solution

The fourth proportional to 68,981.87, 103,416.36 and 35,711.43 is: 53,537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,981.87 : 103,416.36 = 35,711.43 : x
  2. Step 2: Convert to fraction form
    68,981.87/103,416.36 = 35,711.43/x
  3. Step 3: Cross multiply
    68,981.87x = 103,416.36 × 35,711.43
  4. Step 4: Simplify right side
    68,981.87x = 3,693,146,100.99
  5. Step 5: Solve for x
    x = 3,693,146,100.99/68,981.87
  6. Step 6: Final answer
    x = 53,537.93

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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.