Home / 131,936.81-198,169.92-78,732.57

Finding the Fourth Proportional to 131,936.81, 198,169.92 and 78,732.57

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Solution

The fourth proportional to 131,936.81, 198,169.92 and 78,732.57 is: 118,256.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,936.81 : 198,169.92 = 78,732.57 : x
  2. Step 2: Convert to fraction form
    131,936.81/198,169.92 = 78,732.57/x
  3. Step 3: Cross multiply
    131,936.81x = 198,169.92 × 78,732.57
  4. Step 4: Simplify right side
    131,936.81x = 15,602,427,098.29
  5. Step 5: Solve for x
    x = 15,602,427,098.29/131,936.81
  6. Step 6: Final answer
    x = 118,256.82

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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.