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Finding the Fourth Proportional to 117,755.70, 162,930.75 and 102,679.80

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Solution

The fourth proportional to 117,755.70, 162,930.75 and 102,679.80 is: 142,071.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,755.70 : 162,930.75 = 102,679.80 : x
  2. Step 2: Convert to fraction form
    117,755.70/162,930.75 = 102,679.80/x
  3. Step 3: Cross multiply
    117,755.70x = 162,930.75 × 102,679.80
  4. Step 4: Simplify right side
    117,755.70x = 16,729,696,823.85
  5. Step 5: Solve for x
    x = 16,729,696,823.85/117,755.70
  6. Step 6: Final answer
    x = 142,071.23

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1.5x scale

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.