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Finding the Fourth Proportional to 121,774.82, 168,043.43 and 68,059.40

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Solution

The fourth proportional to 121,774.82, 168,043.43 and 68,059.40 is: 93,918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,774.82 : 168,043.43 = 68,059.40 : x
  2. Step 2: Convert to fraction form
    121,774.82/168,043.43 = 68,059.40/x
  3. Step 3: Cross multiply
    121,774.82x = 168,043.43 × 68,059.40
  4. Step 4: Simplify right side
    121,774.82x = 11,436,934,679.45
  5. Step 5: Solve for x
    x = 11,436,934,679.45/121,774.82
  6. Step 6: Final answer
    x = 93,918.72

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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.