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Finding the Fourth Proportional to 121,757.51, 168,041.25 and 68,053.70

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Solution

The fourth proportional to 121,757.51, 168,041.25 and 68,053.70 is: 93,922.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,757.51 : 168,041.25 = 68,053.70 : x
  2. Step 2: Convert to fraction form
    121,757.51/168,041.25 = 68,053.70/x
  3. Step 3: Cross multiply
    121,757.51x = 168,041.25 × 68,053.70
  4. Step 4: Simplify right side
    121,757.51x = 11,435,827,974.92
  5. Step 5: Solve for x
    x = 11,435,827,974.92/121,757.51
  6. Step 6: Final answer
    x = 93,922.98

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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.