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Finding the Fourth Proportional to 81,118.36, 111,943.11 and 45,308.44

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Solution

The fourth proportional to 81,118.36, 111,943.11 and 45,308.44 is: 62,525.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,118.36 : 111,943.11 = 45,308.44 : x
  2. Step 2: Convert to fraction form
    81,118.36/111,943.11 = 45,308.44/x
  3. Step 3: Cross multiply
    81,118.36x = 111,943.11 × 45,308.44
  4. Step 4: Simplify right side
    81,118.36x = 5,071,967,682.85
  5. Step 5: Solve for x
    x = 5,071,967,682.85/81,118.36
  6. Step 6: Final answer
    x = 62,525.52

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1.5x scale

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.