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Finding the Fourth Proportional to 76,672.79, 105,814.92 and 43,145.27

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Solution

The fourth proportional to 76,672.79, 105,814.92 and 43,145.27 is: 59,544.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,672.79 : 105,814.92 = 43,145.27 : x
  2. Step 2: Convert to fraction form
    76,672.79/105,814.92 = 43,145.27/x
  3. Step 3: Cross multiply
    76,672.79x = 105,814.92 × 43,145.27
  4. Step 4: Simplify right side
    76,672.79x = 4,565,412,764.35
  5. Step 5: Solve for x
    x = 4,565,412,764.35/76,672.79
  6. Step 6: Final answer
    x = 59,544.11

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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.