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Finding the Fourth Proportional to 139,708.37, 209,593.80 and 50,961.87

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Solution

The fourth proportional to 139,708.37, 209,593.80 and 50,961.87 is: 76,454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,708.37 : 209,593.80 = 50,961.87 : x
  2. Step 2: Convert to fraction form
    139,708.37/209,593.80 = 50,961.87/x
  3. Step 3: Cross multiply
    139,708.37x = 209,593.80 × 50,961.87
  4. Step 4: Simplify right side
    139,708.37x = 10,681,291,988.41
  5. Step 5: Solve for x
    x = 10,681,291,988.41/139,708.37
  6. Step 6: Final answer
    x = 76,454.21

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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.