Home / 87,208.40-130,812.60-80,793.20

Finding the Fourth Proportional to 87,208.40, 130,812.60 and 80,793.20

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Solution

The fourth proportional to 87,208.40, 130,812.60 and 80,793.20 is: 121,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,208.40 : 130,812.60 = 80,793.20 : x
  2. Step 2: Convert to fraction form
    87,208.40/130,812.60 = 80,793.20/x
  3. Step 3: Cross multiply
    87,208.40x = 130,812.60 × 80,793.20
  4. Step 4: Simplify right side
    87,208.40x = 10,568,768,554.32
  5. Step 5: Solve for x
    x = 10,568,768,554.32/87,208.40
  6. Step 6: Final answer
    x = 121,189.80

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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.