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Finding the Fourth Proportional to 131,796.30, 197,425.65 and 81,722.70

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Solution

The fourth proportional to 131,796.30, 197,425.65 and 81,722.70 is: 122,417.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,796.30 : 197,425.65 = 81,722.70 : x
  2. Step 2: Convert to fraction form
    131,796.30/197,425.65 = 81,722.70/x
  3. Step 3: Cross multiply
    131,796.30x = 197,425.65 × 81,722.70
  4. Step 4: Simplify right side
    131,796.30x = 16,134,157,167.26
  5. Step 5: Solve for x
    x = 16,134,157,167.26/131,796.30
  6. Step 6: Final answer
    x = 122,417.38

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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.