Home / 131,311.90-197,113.65-81,448.30

Finding the Fourth Proportional to 131,311.90, 197,113.65 and 81,448.30

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Solution

The fourth proportional to 131,311.90, 197,113.65 and 81,448.30 is: 122,262.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,311.90 : 197,113.65 = 81,448.30 : x
  2. Step 2: Convert to fraction form
    131,311.90/197,113.65 = 81,448.30/x
  3. Step 3: Cross multiply
    131,311.90x = 197,113.65 × 81,448.30
  4. Step 4: Simplify right side
    131,311.90x = 16,054,571,699.30
  5. Step 5: Solve for x
    x = 16,054,571,699.30/131,311.90
  6. Step 6: Final answer
    x = 122,262.88

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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.