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Finding the Fourth Proportional to 121,755.66, 168,019.68 and 68,041.11

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Solution

The fourth proportional to 121,755.66, 168,019.68 and 68,041.11 is: 93,894.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,755.66 : 168,019.68 = 68,041.11 : x
  2. Step 2: Convert to fraction form
    121,755.66/168,019.68 = 68,041.11/x
  3. Step 3: Cross multiply
    121,755.66x = 168,019.68 × 68,041.11
  4. Step 4: Simplify right side
    121,755.66x = 11,432,245,529.04
  5. Step 5: Solve for x
    x = 11,432,245,529.04/121,755.66
  6. Step 6: Final answer
    x = 93,894.98

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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.