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Finding the Fourth Proportional to 139,551.84, 192,483.96 and 91,789.92

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Solution

The fourth proportional to 139,551.84, 192,483.96 and 91,789.92 is: 126,605.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,551.84 : 192,483.96 = 91,789.92 : x
  2. Step 2: Convert to fraction form
    139,551.84/192,483.96 = 91,789.92/x
  3. Step 3: Cross multiply
    139,551.84x = 192,483.96 × 91,789.92
  4. Step 4: Simplify right side
    139,551.84x = 17,668,087,289.68
  5. Step 5: Solve for x
    x = 17,668,087,289.68/139,551.84
  6. Step 6: Final answer
    x = 126,605.91

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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.