Home / 87,208.20-130,812.30-52,129.80

Finding the Fourth Proportional to 87,208.20, 130,812.30 and 52,129.80

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Solution

The fourth proportional to 87,208.20, 130,812.30 and 52,129.80 is: 78,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,208.20 : 130,812.30 = 52,129.80 : x
  2. Step 2: Convert to fraction form
    87,208.20/130,812.30 = 52,129.80/x
  3. Step 3: Cross multiply
    87,208.20x = 130,812.30 × 52,129.80
  4. Step 4: Simplify right side
    87,208.20x = 6,819,219,036.54
  5. Step 5: Solve for x
    x = 6,819,219,036.54/87,208.20
  6. Step 6: Final answer
    x = 78,194.70

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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.