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Finding the Fourth Proportional to 138,797.22, 208,272.82 and 67,720.46

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Solution

The fourth proportional to 138,797.22, 208,272.82 and 67,720.46 is: 101,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,797.22 : 208,272.82 = 67,720.46 : x
  2. Step 2: Convert to fraction form
    138,797.22/208,272.82 = 67,720.46/x
  3. Step 3: Cross multiply
    138,797.22x = 208,272.82 × 67,720.46
  4. Step 4: Simplify right side
    138,797.22x = 14,104,330,092.21
  5. Step 5: Solve for x
    x = 14,104,330,092.21/138,797.22
  6. Step 6: Final answer
    x = 101,618.25

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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.