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Finding the Fourth Proportional to 78,777.92, 118,168.50 and 43,939.28

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Solution

The fourth proportional to 78,777.92, 118,168.50 and 43,939.28 is: 65,909.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,777.92 : 118,168.50 = 43,939.28 : x
  2. Step 2: Convert to fraction form
    78,777.92/118,168.50 = 43,939.28/x
  3. Step 3: Cross multiply
    78,777.92x = 118,168.50 × 43,939.28
  4. Step 4: Simplify right side
    78,777.92x = 5,192,238,808.68
  5. Step 5: Solve for x
    x = 5,192,238,808.68/78,777.92
  6. Step 6: Final answer
    x = 65,909.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.