Home / 138,911.18-191,693.46-81,549.56

Finding the Fourth Proportional to 138,911.18, 191,693.46 and 81,549.56

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Solution

The fourth proportional to 138,911.18, 191,693.46 and 81,549.56 is: 112,536.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,911.18 : 191,693.46 = 81,549.56 : x
  2. Step 2: Convert to fraction form
    138,911.18/191,693.46 = 81,549.56/x
  3. Step 3: Cross multiply
    138,911.18x = 191,693.46 × 81,549.56
  4. Step 4: Simplify right side
    138,911.18x = 15,632,517,317.88
  5. Step 5: Solve for x
    x = 15,632,517,317.88/138,911.18
  6. Step 6: Final answer
    x = 112,536.06

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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.