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Finding the Fourth Proportional to 78,911.79, 108,896.54 and 43,101.92

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Solution

The fourth proportional to 78,911.79, 108,896.54 and 43,101.92 is: 59,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.79 : 108,896.54 = 43,101.92 : x
  2. Step 2: Convert to fraction form
    78,911.79/108,896.54 = 43,101.92/x
  3. Step 3: Cross multiply
    78,911.79x = 108,896.54 × 43,101.92
  4. Step 4: Simplify right side
    78,911.79x = 4,693,649,195.36
  5. Step 5: Solve for x
    x = 4,693,649,195.36/78,911.79
  6. Step 6: Final answer
    x = 59,479.69

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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.