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Finding the Fourth Proportional to 129,206.80, 193,372.80 and 113,460.40

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Solution

The fourth proportional to 129,206.80, 193,372.80 and 113,460.40 is: 169,806.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,206.80 : 193,372.80 = 113,460.40 : x
  2. Step 2: Convert to fraction form
    129,206.80/193,372.80 = 113,460.40/x
  3. Step 3: Cross multiply
    129,206.80x = 193,372.80 × 113,460.40
  4. Step 4: Simplify right side
    129,206.80x = 21,940,155,237.12
  5. Step 5: Solve for x
    x = 21,940,155,237.12/129,206.80
  6. Step 6: Final answer
    x = 169,806.51

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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.