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Finding the Fourth Proportional to 139,542.45, 192,566.39 and 75,879.69

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Solution

The fourth proportional to 139,542.45, 192,566.39 and 75,879.69 is: 104,712.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,542.45 : 192,566.39 = 75,879.69 : x
  2. Step 2: Convert to fraction form
    139,542.45/192,566.39 = 75,879.69/x
  3. Step 3: Cross multiply
    139,542.45x = 192,566.39 × 75,879.69
  4. Step 4: Simplify right side
    139,542.45x = 14,611,877,598.22
  5. Step 5: Solve for x
    x = 14,611,877,598.22/139,542.45
  6. Step 6: Final answer
    x = 104,712.78

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1.5x scale

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.