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Finding the Fourth Proportional to 139,425.49, 209,138.91 and 34,244.47

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Solution

The fourth proportional to 139,425.49, 209,138.91 and 34,244.47 is: 51,366.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,425.49 : 209,138.91 = 34,244.47 : x
  2. Step 2: Convert to fraction form
    139,425.49/209,138.91 = 34,244.47/x
  3. Step 3: Cross multiply
    139,425.49x = 209,138.91 × 34,244.47
  4. Step 4: Simplify right side
    139,425.49x = 7,161,851,129.33
  5. Step 5: Solve for x
    x = 7,161,851,129.33/139,425.49
  6. Step 6: Final answer
    x = 51,366.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.