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Finding the Fourth Proportional to 139,650.56, 192,720.08 and 75,988.68

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Solution

The fourth proportional to 139,650.56, 192,720.08 and 75,988.68 is: 104,865.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,650.56 : 192,720.08 = 75,988.68 : x
  2. Step 2: Convert to fraction form
    139,650.56/192,720.08 = 75,988.68/x
  3. Step 3: Cross multiply
    139,650.56x = 192,720.08 × 75,988.68
  4. Step 4: Simplify right side
    139,650.56x = 14,644,544,488.69
  5. Step 5: Solve for x
    x = 14,644,544,488.69/139,650.56
  6. Step 6: Final answer
    x = 104,865.63

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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.