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Finding the Fourth Proportional to 131,447.70, 197,171.55 and 81,365.40

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Solution

The fourth proportional to 131,447.70, 197,171.55 and 81,365.40 is: 122,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,447.70 : 197,171.55 = 81,365.40 : x
  2. Step 2: Convert to fraction form
    131,447.70/197,171.55 = 81,365.40/x
  3. Step 3: Cross multiply
    131,447.70x = 197,171.55 × 81,365.40
  4. Step 4: Simplify right side
    131,447.70x = 16,042,942,034.37
  5. Step 5: Solve for x
    x = 16,042,942,034.37/131,447.70
  6. Step 6: Final answer
    x = 122,048.10

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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.