Home / 131,105.79-196,567.56-66,939.21

Finding the Fourth Proportional to 131,105.79, 196,567.56 and 66,939.21

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Solution

The fourth proportional to 131,105.79, 196,567.56 and 66,939.21 is: 100,362.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,105.79 : 196,567.56 = 66,939.21 : x
  2. Step 2: Convert to fraction form
    131,105.79/196,567.56 = 66,939.21/x
  3. Step 3: Cross multiply
    131,105.79x = 196,567.56 × 66,939.21
  4. Step 4: Simplify right side
    131,105.79x = 13,158,077,178.03
  5. Step 5: Solve for x
    x = 13,158,077,178.03/131,105.79
  6. Step 6: Final answer
    x = 100,362.29

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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.