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Finding the Fourth Proportional to 78,940.52, 108,934.66 and 43,131.76

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Solution

The fourth proportional to 78,940.52, 108,934.66 and 43,131.76 is: 59,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,940.52 : 108,934.66 = 43,131.76 : x
  2. Step 2: Convert to fraction form
    78,940.52/108,934.66 = 43,131.76/x
  3. Step 3: Cross multiply
    78,940.52x = 108,934.66 × 43,131.76
  4. Step 4: Simplify right side
    78,940.52x = 4,698,543,610.80
  5. Step 5: Solve for x
    x = 4,698,543,610.80/78,940.52
  6. Step 6: Final answer
    x = 59,520.05

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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.