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Finding the Fourth Proportional to 139,757.52, 192,866.76 and 80,130

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Solution

The fourth proportional to 139,757.52, 192,866.76 and 80,130 is: 110,580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,757.52 : 192,866.76 = 80,130 : x
  2. Step 2: Convert to fraction form
    139,757.52/192,866.76 = 80,130/x
  3. Step 3: Cross multiply
    139,757.52x = 192,866.76 × 80,130
  4. Step 4: Simplify right side
    139,757.52x = 15,454,413,478.80
  5. Step 5: Solve for x
    x = 15,454,413,478.80/139,757.52
  6. Step 6: Final answer
    x = 110,580.19

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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.