Home / 131,520.60-197,135.10-72,398.70

Finding the Fourth Proportional to 131,520.60, 197,135.10 and 72,398.70

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Solution

The fourth proportional to 131,520.60, 197,135.10 and 72,398.70 is: 108,517.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,520.60 : 197,135.10 = 72,398.70 : x
  2. Step 2: Convert to fraction form
    131,520.60/197,135.10 = 72,398.70/x
  3. Step 3: Cross multiply
    131,520.60x = 197,135.10 × 72,398.70
  4. Step 4: Simplify right side
    131,520.60x = 14,272,324,964.37
  5. Step 5: Solve for x
    x = 14,272,324,964.37/131,520.60
  6. Step 6: Final answer
    x = 108,517.79

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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.