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Finding the Fourth Proportional to 139,789.90, 192,903.20 and 79,352.46

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Solution

The fourth proportional to 139,789.90, 192,903.20 and 79,352.46 is: 109,502.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,789.90 : 192,903.20 = 79,352.46 : x
  2. Step 2: Convert to fraction form
    139,789.90/192,903.20 = 79,352.46/x
  3. Step 3: Cross multiply
    139,789.90x = 192,903.20 × 79,352.46
  4. Step 4: Simplify right side
    139,789.90x = 15,307,342,497.36
  5. Step 5: Solve for x
    x = 15,307,342,497.36/139,789.90
  6. Step 6: Final answer
    x = 109,502.50

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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.