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Finding the Fourth Proportional to 121,841.55, 182,763.11 and 79,756.97

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Solution

The fourth proportional to 121,841.55, 182,763.11 and 79,756.97 is: 119,635.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,841.55 : 182,763.11 = 79,756.97 : x
  2. Step 2: Convert to fraction form
    121,841.55/182,763.11 = 79,756.97/x
  3. Step 3: Cross multiply
    121,841.55x = 182,763.11 × 79,756.97
  4. Step 4: Simplify right side
    121,841.55x = 14,576,631,166.95
  5. Step 5: Solve for x
    x = 14,576,631,166.95/121,841.55
  6. Step 6: Final answer
    x = 119,635.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.