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Finding the Fourth Proportional to 131,461.60, 197,192.40 and 126,212.80

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Solution

The fourth proportional to 131,461.60, 197,192.40 and 126,212.80 is: 189,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,461.60 : 197,192.40 = 126,212.80 : x
  2. Step 2: Convert to fraction form
    131,461.60/197,192.40 = 126,212.80/x
  3. Step 3: Cross multiply
    131,461.60x = 197,192.40 × 126,212.80
  4. Step 4: Simplify right side
    131,461.60x = 24,888,204,942.72
  5. Step 5: Solve for x
    x = 24,888,204,942.72/131,461.60
  6. Step 6: Final answer
    x = 189,319.20

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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.