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Finding the Fourth Proportional to 121,493.91, 167,661.59 and 67,778.91

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Solution

The fourth proportional to 121,493.91, 167,661.59 and 67,778.91 is: 93,534.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,493.91 : 167,661.59 = 67,778.91 : x
  2. Step 2: Convert to fraction form
    121,493.91/167,661.59 = 67,778.91/x
  3. Step 3: Cross multiply
    121,493.91x = 167,661.59 × 67,778.91
  4. Step 4: Simplify right side
    121,493.91x = 11,363,919,480.17
  5. Step 5: Solve for x
    x = 11,363,919,480.17/121,493.91
  6. Step 6: Final answer
    x = 93,534.89

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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.