Home / 149,771.70-206,685.81-81,787.86

Finding the Fourth Proportional to 149,771.70, 206,685.81 and 81,787.86

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Solution

The fourth proportional to 149,771.70, 206,685.81 and 81,787.86 is: 112,867.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,771.70 : 206,685.81 = 81,787.86 : x
  2. Step 2: Convert to fraction form
    149,771.70/206,685.81 = 81,787.86/x
  3. Step 3: Cross multiply
    149,771.70x = 206,685.81 × 81,787.86
  4. Step 4: Simplify right side
    149,771.70x = 16,904,390,092.27
  5. Step 5: Solve for x
    x = 16,904,390,092.27/149,771.70
  6. Step 6: Final answer
    x = 112,867.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.