Home / 149,439.76-206,225.51-81,456.73

Finding the Fourth Proportional to 149,439.76, 206,225.51 and 81,456.73

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Solution

The fourth proportional to 149,439.76, 206,225.51 and 81,456.73 is: 112,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,439.76 : 206,225.51 = 81,456.73 : x
  2. Step 2: Convert to fraction form
    149,439.76/206,225.51 = 81,456.73/x
  3. Step 3: Cross multiply
    149,439.76x = 206,225.51 × 81,456.73
  4. Step 4: Simplify right side
    149,439.76x = 16,798,455,375.26
  5. Step 5: Solve for x
    x = 16,798,455,375.26/149,439.76
  6. Step 6: Final answer
    x = 112,409.55

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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.