Home / 131,424.10-197,136.15-81,819.70

Finding the Fourth Proportional to 131,424.10, 197,136.15 and 81,819.70

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Solution

The fourth proportional to 131,424.10, 197,136.15 and 81,819.70 is: 122,729.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,424.10 : 197,136.15 = 81,819.70 : x
  2. Step 2: Convert to fraction form
    131,424.10/197,136.15 = 81,819.70/x
  3. Step 3: Cross multiply
    131,424.10x = 197,136.15 × 81,819.70
  4. Step 4: Simplify right side
    131,424.10x = 16,129,620,652.16
  5. Step 5: Solve for x
    x = 16,129,620,652.16/131,424.10
  6. Step 6: Final answer
    x = 122,729.55

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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.