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Finding the Fourth Proportional to 139,196.68, 192,091.92 and 75,534.48

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Solution

The fourth proportional to 139,196.68, 192,091.92 and 75,534.48 is: 104,237.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,196.68 : 192,091.92 = 75,534.48 : x
  2. Step 2: Convert to fraction form
    139,196.68/192,091.92 = 75,534.48/x
  3. Step 3: Cross multiply
    139,196.68x = 192,091.92 × 75,534.48
  4. Step 4: Simplify right side
    139,196.68x = 14,509,563,289.40
  5. Step 5: Solve for x
    x = 14,509,563,289.40/139,196.68
  6. Step 6: Final answer
    x = 104,237.85

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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.