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Finding the Fourth Proportional to 129,009.80, 193,077.30 and 113,263.40

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Solution

The fourth proportional to 129,009.80, 193,077.30 and 113,263.40 is: 169,511.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,009.80 : 193,077.30 = 113,263.40 : x
  2. Step 2: Convert to fraction form
    129,009.80/193,077.30 = 113,263.40/x
  3. Step 3: Cross multiply
    129,009.80x = 193,077.30 × 113,263.40
  4. Step 4: Simplify right side
    129,009.80x = 21,868,591,460.82
  5. Step 5: Solve for x
    x = 21,868,591,460.82/129,009.80
  6. Step 6: Final answer
    x = 169,511.09

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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.