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Finding the Fourth Proportional to 130,019.20, 195,028.80 and 115,244.80

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Solution

The fourth proportional to 130,019.20, 195,028.80 and 115,244.80 is: 172,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,019.20 : 195,028.80 = 115,244.80 : x
  2. Step 2: Convert to fraction form
    130,019.20/195,028.80 = 115,244.80/x
  3. Step 3: Cross multiply
    130,019.20x = 195,028.80 × 115,244.80
  4. Step 4: Simplify right side
    130,019.20x = 22,476,055,050.24
  5. Step 5: Solve for x
    x = 22,476,055,050.24/130,019.20
  6. Step 6: Final answer
    x = 172,867.20

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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.