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Finding the Fourth Proportional to 81,108.79, 111,927.86 and 45,297.75

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Solution

The fourth proportional to 81,108.79, 111,927.86 and 45,297.75 is: 62,509.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,108.79 : 111,927.86 = 45,297.75 : x
  2. Step 2: Convert to fraction form
    81,108.79/111,927.86 = 45,297.75/x
  3. Step 3: Cross multiply
    81,108.79x = 111,927.86 × 45,297.75
  4. Step 4: Simplify right side
    81,108.79x = 5,070,079,993.83
  5. Step 5: Solve for x
    x = 5,070,079,993.83/81,108.79
  6. Step 6: Final answer
    x = 62,509.62

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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.