Home / 131,462.20-197,078.10-78,815.80

Finding the Fourth Proportional to 131,462.20, 197,078.10 and 78,815.80

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Solution

The fourth proportional to 131,462.20, 197,078.10 and 78,815.80 is: 118,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,462.20 : 197,078.10 = 78,815.80 : x
  2. Step 2: Convert to fraction form
    131,462.20/197,078.10 = 78,815.80/x
  3. Step 3: Cross multiply
    131,462.20x = 197,078.10 × 78,815.80
  4. Step 4: Simplify right side
    131,462.20x = 15,532,868,113.98
  5. Step 5: Solve for x
    x = 15,532,868,113.98/131,462.20
  6. Step 6: Final answer
    x = 118,154.63

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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.