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Finding the Fourth Proportional to 130,218.80, 195,328.20 and 71,169.80

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Solution

The fourth proportional to 130,218.80, 195,328.20 and 71,169.80 is: 106,754.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,218.80 : 195,328.20 = 71,169.80 : x
  2. Step 2: Convert to fraction form
    130,218.80/195,328.20 = 71,169.80/x
  3. Step 3: Cross multiply
    130,218.80x = 195,328.20 × 71,169.80
  4. Step 4: Simplify right side
    130,218.80x = 13,901,468,928.36
  5. Step 5: Solve for x
    x = 13,901,468,928.36/130,218.80
  6. Step 6: Final answer
    x = 106,754.70

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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.