Home / 131,036.10-196,554.15-81,431.70

Finding the Fourth Proportional to 131,036.10, 196,554.15 and 81,431.70

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Solution

The fourth proportional to 131,036.10, 196,554.15 and 81,431.70 is: 122,147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,036.10 : 196,554.15 = 81,431.70 : x
  2. Step 2: Convert to fraction form
    131,036.10/196,554.15 = 81,431.70/x
  3. Step 3: Cross multiply
    131,036.10x = 196,554.15 × 81,431.70
  4. Step 4: Simplify right side
    131,036.10x = 16,005,738,576.56
  5. Step 5: Solve for x
    x = 16,005,738,576.56/131,036.10
  6. Step 6: Final answer
    x = 122,147.55

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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.