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Finding the Fourth Proportional to 77,076.25, 115,614.38 and 21,672.25

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Solution

The fourth proportional to 77,076.25, 115,614.38 and 21,672.25 is: 32,508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,076.25 : 115,614.38 = 21,672.25 : x
  2. Step 2: Convert to fraction form
    77,076.25/115,614.38 = 21,672.25/x
  3. Step 3: Cross multiply
    77,076.25x = 115,614.38 × 21,672.25
  4. Step 4: Simplify right side
    77,076.25x = 2,505,623,746.96
  5. Step 5: Solve for x
    x = 2,505,623,746.96/77,076.25
  6. Step 6: Final answer
    x = 32,508.38

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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.