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Finding the Fourth Proportional to 139,394.28, 192,363.48 and 75,731.52

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Solution

The fourth proportional to 139,394.28, 192,363.48 and 75,731.52 is: 104,509.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,394.28 : 192,363.48 = 75,731.52 : x
  2. Step 2: Convert to fraction form
    139,394.28/192,363.48 = 75,731.52/x
  3. Step 3: Cross multiply
    139,394.28x = 192,363.48 × 75,731.52
  4. Step 4: Simplify right side
    139,394.28x = 14,567,978,732.89
  5. Step 5: Solve for x
    x = 14,567,978,732.89/139,394.28
  6. Step 6: Final answer
    x = 104,509.16

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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.