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Finding the Fourth Proportional to 121,744, 168,006.72 and 73,988.43

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Solution

The fourth proportional to 121,744, 168,006.72 and 73,988.43 is: 102,104.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,744 : 168,006.72 = 73,988.43 : x
  2. Step 2: Convert to fraction form
    121,744/168,006.72 = 73,988.43/x
  3. Step 3: Cross multiply
    121,744x = 168,006.72 × 73,988.43
  4. Step 4: Simplify right side
    121,744x = 12,430,553,442.25
  5. Step 5: Solve for x
    x = 12,430,553,442.25/121,744
  6. Step 6: Final answer
    x = 102,104.03

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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.