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Finding the Fourth Proportional to 130,019.70, 195,029.55 and 115,245.30

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Solution

The fourth proportional to 130,019.70, 195,029.55 and 115,245.30 is: 172,867.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,019.70 : 195,029.55 = 115,245.30 : x
  2. Step 2: Convert to fraction form
    130,019.70/195,029.55 = 115,245.30/x
  3. Step 3: Cross multiply
    130,019.70x = 195,029.55 × 115,245.30
  4. Step 4: Simplify right side
    130,019.70x = 22,476,238,998.62
  5. Step 5: Solve for x
    x = 22,476,238,998.62/130,019.70
  6. Step 6: Final answer
    x = 172,867.95

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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.