Home / 149,981.70-206,974.86-81,997.59

Finding the Fourth Proportional to 149,981.70, 206,974.86 and 81,997.59

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Solution

The fourth proportional to 149,981.70, 206,974.86 and 81,997.59 is: 113,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,981.70 : 206,974.86 = 81,997.59 : x
  2. Step 2: Convert to fraction form
    149,981.70/206,974.86 = 81,997.59/x
  3. Step 3: Cross multiply
    149,981.70x = 206,974.86 × 81,997.59
  4. Step 4: Simplify right side
    149,981.70x = 16,971,439,710.59
  5. Step 5: Solve for x
    x = 16,971,439,710.59/149,981.70
  6. Step 6: Final answer
    x = 113,156.74

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1.5x scale

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.