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Finding the Fourth Proportional to 121,491.70, 167,658.05 and 67,776.68

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Solution

The fourth proportional to 121,491.70, 167,658.05 and 67,776.68 is: 93,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,491.70 : 167,658.05 = 67,776.68 : x
  2. Step 2: Convert to fraction form
    121,491.70/167,658.05 = 67,776.68/x
  3. Step 3: Cross multiply
    121,491.70x = 167,658.05 × 67,776.68
  4. Step 4: Simplify right side
    121,491.70x = 11,363,306,592.86
  5. Step 5: Solve for x
    x = 11,363,306,592.86/121,491.70
  6. Step 6: Final answer
    x = 93,531.55

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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.