Home / 149,141.43-205,816.05-81,158.94

Finding the Fourth Proportional to 149,141.43, 205,816.05 and 81,158.94

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Solution

The fourth proportional to 149,141.43, 205,816.05 and 81,158.94 is: 111,999.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,141.43 : 205,816.05 = 81,158.94 : x
  2. Step 2: Convert to fraction form
    149,141.43/205,816.05 = 81,158.94/x
  3. Step 3: Cross multiply
    149,141.43x = 205,816.05 × 81,158.94
  4. Step 4: Simplify right side
    149,141.43x = 16,703,812,452.99
  5. Step 5: Solve for x
    x = 16,703,812,452.99/149,141.43
  6. Step 6: Final answer
    x = 111,999.81

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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.