Home / 149,119.12-205,785.27-81,136.57

Finding the Fourth Proportional to 149,119.12, 205,785.27 and 81,136.57

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Solution

The fourth proportional to 149,119.12, 205,785.27 and 81,136.57 is: 111,968.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,119.12 : 205,785.27 = 81,136.57 : x
  2. Step 2: Convert to fraction form
    149,119.12/205,785.27 = 81,136.57/x
  3. Step 3: Cross multiply
    149,119.12x = 205,785.27 × 81,136.57
  4. Step 4: Simplify right side
    149,119.12x = 16,696,709,529.71
  5. Step 5: Solve for x
    x = 16,696,709,529.71/149,119.12
  6. Step 6: Final answer
    x = 111,968.94

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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.