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Finding the Fourth Proportional to 139,371.18, 192,333.22 and 75,709

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Solution

The fourth proportional to 139,371.18, 192,333.22 and 75,709 is: 104,478.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,371.18 : 192,333.22 = 75,709 : x
  2. Step 2: Convert to fraction form
    139,371.18/192,333.22 = 75,709/x
  3. Step 3: Cross multiply
    139,371.18x = 192,333.22 × 75,709
  4. Step 4: Simplify right side
    139,371.18x = 14,561,355,752.98
  5. Step 5: Solve for x
    x = 14,561,355,752.98/139,371.18
  6. Step 6: Final answer
    x = 104,478.96

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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.