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Finding the Fourth Proportional to 278,605.98, 417,909.51 and 68,244.66

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Solution

The fourth proportional to 278,605.98, 417,909.51 and 68,244.66 is: 102,367.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,605.98 : 417,909.51 = 68,244.66 : x
  2. Step 2: Convert to fraction form
    278,605.98/417,909.51 = 68,244.66/x
  3. Step 3: Cross multiply
    278,605.98x = 417,909.51 × 68,244.66
  4. Step 4: Simplify right side
    278,605.98x = 28,520,092,420.72
  5. Step 5: Solve for x
    x = 28,520,092,420.72/278,605.98
  6. Step 6: Final answer
    x = 102,367.12

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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.