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Finding the Fourth Proportional to 121,757.52, 168,024.89 and 68,042.52

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Solution

The fourth proportional to 121,757.52, 168,024.89 and 68,042.52 is: 93,898.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,757.52 : 168,024.89 = 68,042.52 : x
  2. Step 2: Convert to fraction form
    121,757.52/168,024.89 = 68,042.52/x
  3. Step 3: Cross multiply
    121,757.52x = 168,024.89 × 68,042.52
  4. Step 4: Simplify right side
    121,757.52x = 11,432,836,598.11
  5. Step 5: Solve for x
    x = 11,432,836,598.11/121,757.52
  6. Step 6: Final answer
    x = 93,898.40

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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.