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Finding the Fourth Proportional to 131,780.60, 197,670.90 and 31,940.80

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Solution

The fourth proportional to 131,780.60, 197,670.90 and 31,940.80 is: 47,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,780.60 : 197,670.90 = 31,940.80 : x
  2. Step 2: Convert to fraction form
    131,780.60/197,670.90 = 31,940.80/x
  3. Step 3: Cross multiply
    131,780.60x = 197,670.90 × 31,940.80
  4. Step 4: Simplify right side
    131,780.60x = 6,313,766,308.32
  5. Step 5: Solve for x
    x = 6,313,766,308.32/131,780.60
  6. Step 6: Final answer
    x = 47,911.20

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1.5x scale

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.