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Finding the Fourth Proportional to 139,418.05, 192,398.12 and 75,755.84

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Solution

The fourth proportional to 139,418.05, 192,398.12 and 75,755.84 is: 104,543.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.05 : 192,398.12 = 75,755.84 : x
  2. Step 2: Convert to fraction form
    139,418.05/192,398.12 = 75,755.84/x
  3. Step 3: Cross multiply
    139,418.05x = 192,398.12 × 75,755.84
  4. Step 4: Simplify right side
    139,418.05x = 14,575,281,927.62
  5. Step 5: Solve for x
    x = 14,575,281,927.62/139,418.05
  6. Step 6: Final answer
    x = 104,543.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.