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Finding the Fourth Proportional to 121,899.82, 168,213.88 and 68,175.56

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Solution

The fourth proportional to 121,899.82, 168,213.88 and 68,175.56 is: 94,077.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,899.82 : 168,213.88 = 68,175.56 : x
  2. Step 2: Convert to fraction form
    121,899.82/168,213.88 = 68,175.56/x
  3. Step 3: Cross multiply
    121,899.82x = 168,213.88 × 68,175.56
  4. Step 4: Simplify right side
    121,899.82x = 11,468,075,468.77
  5. Step 5: Solve for x
    x = 11,468,075,468.77/121,899.82
  6. Step 6: Final answer
    x = 94,077.87

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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.