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Finding the Fourth Proportional to 130,228.80, 195,343.20 and 71,179.80

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Solution

The fourth proportional to 130,228.80, 195,343.20 and 71,179.80 is: 106,769.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,228.80 : 195,343.20 = 71,179.80 : x
  2. Step 2: Convert to fraction form
    130,228.80/195,343.20 = 71,179.80/x
  3. Step 3: Cross multiply
    130,228.80x = 195,343.20 × 71,179.80
  4. Step 4: Simplify right side
    130,228.80x = 13,904,489,907.36
  5. Step 5: Solve for x
    x = 13,904,489,907.36/130,228.80
  6. Step 6: Final answer
    x = 106,769.70

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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.