Home / 149,742.46-206,645.34-81,760.78

Finding the Fourth Proportional to 149,742.46, 206,645.34 and 81,760.78

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Solution

The fourth proportional to 149,742.46, 206,645.34 and 81,760.78 is: 112,830.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,742.46 : 206,645.34 = 81,760.78 : x
  2. Step 2: Convert to fraction form
    149,742.46/206,645.34 = 81,760.78/x
  3. Step 3: Cross multiply
    149,742.46x = 206,645.34 × 81,760.78
  4. Step 4: Simplify right side
    149,742.46x = 16,895,484,181.77
  5. Step 5: Solve for x
    x = 16,895,484,181.77/149,742.46
  6. Step 6: Final answer
    x = 112,830.28

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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.