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Finding the Fourth Proportional to 278,953.63, 418,426.80 and 68,593.39

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Solution

The fourth proportional to 278,953.63, 418,426.80 and 68,593.39 is: 102,889.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,953.63 : 418,426.80 = 68,593.39 : x
  2. Step 2: Convert to fraction form
    278,953.63/418,426.80 = 68,593.39/x
  3. Step 3: Cross multiply
    278,953.63x = 418,426.80 × 68,593.39
  4. Step 4: Simplify right side
    278,953.63x = 28,701,312,678.85
  5. Step 5: Solve for x
    x = 28,701,312,678.85/278,953.63
  6. Step 6: Final answer
    x = 102,889.19

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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.