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Finding the Fourth Proportional to 139,228.80, 192,135.91 and 75,566.61

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Solution

The fourth proportional to 139,228.80, 192,135.91 and 75,566.61 is: 104,282.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,228.80 : 192,135.91 = 75,566.61 : x
  2. Step 2: Convert to fraction form
    139,228.80/192,135.91 = 75,566.61/x
  3. Step 3: Cross multiply
    139,228.80x = 192,135.91 × 75,566.61
  4. Step 4: Simplify right side
    139,228.80x = 14,519,059,377.97
  5. Step 5: Solve for x
    x = 14,519,059,377.97/139,228.80
  6. Step 6: Final answer
    x = 104,282.01

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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.