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Finding the Fourth Proportional to 76,887.88, 115,351.26 and 21,483.88

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Solution

The fourth proportional to 76,887.88, 115,351.26 and 21,483.88 is: 32,231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,887.88 : 115,351.26 = 21,483.88 : x
  2. Step 2: Convert to fraction form
    76,887.88/115,351.26 = 21,483.88/x
  3. Step 3: Cross multiply
    76,887.88x = 115,351.26 × 21,483.88
  4. Step 4: Simplify right side
    76,887.88x = 2,478,192,627.69
  5. Step 5: Solve for x
    x = 2,478,192,627.69/76,887.88
  6. Step 6: Final answer
    x = 32,231.25

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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.