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Finding the Fourth Proportional to 138,911, 208,366.32 and 33,729.80

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Solution

The fourth proportional to 138,911, 208,366.32 and 33,729.80 is: 50,594.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,911 : 208,366.32 = 33,729.80 : x
  2. Step 2: Convert to fraction form
    138,911/208,366.32 = 33,729.80/x
  3. Step 3: Cross multiply
    138,911x = 208,366.32 × 33,729.80
  4. Step 4: Simplify right side
    138,911x = 7,028,154,300.34
  5. Step 5: Solve for x
    x = 7,028,154,300.34/138,911
  6. Step 6: Final answer
    x = 50,594.66

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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.