Home / 129,979.20-195,163.20-90,710.40

Finding the Fourth Proportional to 129,979.20, 195,163.20 and 90,710.40

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Solution

The fourth proportional to 129,979.20, 195,163.20 and 90,710.40 is: 136,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,979.20 : 195,163.20 = 90,710.40 : x
  2. Step 2: Convert to fraction form
    129,979.20/195,163.20 = 90,710.40/x
  3. Step 3: Cross multiply
    129,979.20x = 195,163.20 × 90,710.40
  4. Step 4: Simplify right side
    129,979.20x = 17,703,331,937.28
  5. Step 5: Solve for x
    x = 17,703,331,937.28/129,979.20
  6. Step 6: Final answer
    x = 136,201.27

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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.