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Finding the Fourth Proportional to 139,274.88, 192,275.12 and 106,745.28

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Solution

The fourth proportional to 139,274.88, 192,275.12 and 106,745.28 is: 147,366.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,274.88 : 192,275.12 = 106,745.28 : x
  2. Step 2: Convert to fraction form
    139,274.88/192,275.12 = 106,745.28/x
  3. Step 3: Cross multiply
    139,274.88x = 192,275.12 × 106,745.28
  4. Step 4: Simplify right side
    139,274.88x = 20,524,461,521.43
  5. Step 5: Solve for x
    x = 20,524,461,521.43/139,274.88
  6. Step 6: Final answer
    x = 147,366.57

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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.