Home / 149,118.17-205,776.91-81,135.42

Finding the Fourth Proportional to 149,118.17, 205,776.91 and 81,135.42

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Solution

The fourth proportional to 149,118.17, 205,776.91 and 81,135.42 is: 111,963.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,118.17 : 205,776.91 = 81,135.42 : x
  2. Step 2: Convert to fraction form
    149,118.17/205,776.91 = 81,135.42/x
  3. Step 3: Cross multiply
    149,118.17x = 205,776.91 × 81,135.42
  4. Step 4: Simplify right side
    149,118.17x = 16,695,796,019.15
  5. Step 5: Solve for x
    x = 16,695,796,019.15/149,118.17
  6. Step 6: Final answer
    x = 111,963.53

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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.