Home / 131,498.20-197,132.10-78,851.80

Finding the Fourth Proportional to 131,498.20, 197,132.10 and 78,851.80

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Solution

The fourth proportional to 131,498.20, 197,132.10 and 78,851.80 is: 118,208.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,498.20 : 197,132.10 = 78,851.80 : x
  2. Step 2: Convert to fraction form
    131,498.20/197,132.10 = 78,851.80/x
  3. Step 3: Cross multiply
    131,498.20x = 197,132.10 × 78,851.80
  4. Step 4: Simplify right side
    131,498.20x = 15,544,220,922.78
  5. Step 5: Solve for x
    x = 15,544,220,922.78/131,498.20
  6. Step 6: Final answer
    x = 118,208.62

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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.