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Finding the Fourth Proportional to 121,760.79, 168,030.51 and 68,046.70

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Solution

The fourth proportional to 121,760.79, 168,030.51 and 68,046.70 is: 93,904.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,760.79 : 168,030.51 = 68,046.70 : x
  2. Step 2: Convert to fraction form
    121,760.79/168,030.51 = 68,046.70/x
  3. Step 3: Cross multiply
    121,760.79x = 168,030.51 × 68,046.70
  4. Step 4: Simplify right side
    121,760.79x = 11,433,921,704.82
  5. Step 5: Solve for x
    x = 11,433,921,704.82/121,760.79
  6. Step 6: Final answer
    x = 93,904.79

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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.