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Finding the Fourth Proportional to 121,761.88, 168,038.86 and 68,051.19

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Solution

The fourth proportional to 121,761.88, 168,038.86 and 68,051.19 is: 93,914.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,761.88 : 168,038.86 = 68,051.19 : x
  2. Step 2: Convert to fraction form
    121,761.88/168,038.86 = 68,051.19/x
  3. Step 3: Cross multiply
    121,761.88x = 168,038.86 × 68,051.19
  4. Step 4: Simplify right side
    121,761.88x = 11,435,243,799.02
  5. Step 5: Solve for x
    x = 11,435,243,799.02/121,761.88
  6. Step 6: Final answer
    x = 93,914.81

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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.