Home / 131,640.20-197,460.30-72,657.80

Finding the Fourth Proportional to 131,640.20, 197,460.30 and 72,657.80

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Solution

The fourth proportional to 131,640.20, 197,460.30 and 72,657.80 is: 108,986.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,640.20 : 197,460.30 = 72,657.80 : x
  2. Step 2: Convert to fraction form
    131,640.20/197,460.30 = 72,657.80/x
  3. Step 3: Cross multiply
    131,640.20x = 197,460.30 × 72,657.80
  4. Step 4: Simplify right side
    131,640.20x = 14,347,030,985.34
  5. Step 5: Solve for x
    x = 14,347,030,985.34/131,640.20
  6. Step 6: Final answer
    x = 108,986.70

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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.