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Finding the Fourth Proportional to 139,417.99, 192,396.42 and 75,755.77

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Solution

The fourth proportional to 139,417.99, 192,396.42 and 75,755.77 is: 104,542.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,417.99 : 192,396.42 = 75,755.77 : x
  2. Step 2: Convert to fraction form
    139,417.99/192,396.42 = 75,755.77/x
  3. Step 3: Cross multiply
    139,417.99x = 192,396.42 × 75,755.77
  4. Step 4: Simplify right side
    139,417.99x = 14,575,138,942.34
  5. Step 5: Solve for x
    x = 14,575,138,942.34/139,417.99
  6. Step 6: Final answer
    x = 104,542.74

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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.