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Finding the Fourth Proportional to 117,930.20, 176,895.30 and 80,605.40

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Solution

The fourth proportional to 117,930.20, 176,895.30 and 80,605.40 is: 120,908.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,930.20 : 176,895.30 = 80,605.40 : x
  2. Step 2: Convert to fraction form
    117,930.20/176,895.30 = 80,605.40/x
  3. Step 3: Cross multiply
    117,930.20x = 176,895.30 × 80,605.40
  4. Step 4: Simplify right side
    117,930.20x = 14,258,716,414.62
  5. Step 5: Solve for x
    x = 14,258,716,414.62/117,930.20
  6. Step 6: Final answer
    x = 120,908.10

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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.