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Finding the Fourth Proportional to 139,390.11, 192,359.27 and 75,727.89

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Solution

The fourth proportional to 139,390.11, 192,359.27 and 75,727.89 is: 104,504.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,390.11 : 192,359.27 = 75,727.89 : x
  2. Step 2: Convert to fraction form
    139,390.11/192,359.27 = 75,727.89/x
  3. Step 3: Cross multiply
    139,390.11x = 192,359.27 × 75,727.89
  4. Step 4: Simplify right side
    139,390.11x = 14,566,961,828.36
  5. Step 5: Solve for x
    x = 14,566,961,828.36/139,390.11
  6. Step 6: Final answer
    x = 104,504.99

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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.