Home / 149,119.17-205,778.29-81,136.42

Finding the Fourth Proportional to 149,119.17, 205,778.29 and 81,136.42

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Solution

The fourth proportional to 149,119.17, 205,778.29 and 81,136.42 is: 111,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,119.17 : 205,778.29 = 81,136.42 : x
  2. Step 2: Convert to fraction form
    149,119.17/205,778.29 = 81,136.42/x
  3. Step 3: Cross multiply
    149,119.17x = 205,778.29 × 81,136.42
  4. Step 4: Simplify right side
    149,119.17x = 16,696,113,764.32
  5. Step 5: Solve for x
    x = 16,696,113,764.32/149,119.17
  6. Step 6: Final answer
    x = 111,964.91

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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.