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Finding the Fourth Proportional to 278,937.63, 418,402.80 and 68,577.39

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Solution

The fourth proportional to 278,937.63, 418,402.80 and 68,577.39 is: 102,865.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,937.63 : 418,402.80 = 68,577.39 : x
  2. Step 2: Convert to fraction form
    278,937.63/418,402.80 = 68,577.39/x
  3. Step 3: Cross multiply
    278,937.63x = 418,402.80 × 68,577.39
  4. Step 4: Simplify right side
    278,937.63x = 28,692,971,992.69
  5. Step 5: Solve for x
    x = 28,692,971,992.69/278,937.63
  6. Step 6: Final answer
    x = 102,865.19

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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.