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Finding the Fourth Proportional to 121,755.10, 168,021.55 and 68,040.10

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Solution

The fourth proportional to 121,755.10, 168,021.55 and 68,040.10 is: 93,895.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,755.10 : 168,021.55 = 68,040.10 : x
  2. Step 2: Convert to fraction form
    121,755.10/168,021.55 = 68,040.10/x
  3. Step 3: Cross multiply
    121,755.10x = 168,021.55 × 68,040.10
  4. Step 4: Simplify right side
    121,755.10x = 11,432,202,723.95
  5. Step 5: Solve for x
    x = 11,432,202,723.95/121,755.10
  6. Step 6: Final answer
    x = 93,895.06

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1.5x scale

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.