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Finding the Fourth Proportional to 84,911.79, 127,367.24 and 21,731.79

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Solution

The fourth proportional to 84,911.79, 127,367.24 and 21,731.79 is: 32,597.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,911.79 : 127,367.24 = 21,731.79 : x
  2. Step 2: Convert to fraction form
    84,911.79/127,367.24 = 21,731.79/x
  3. Step 3: Cross multiply
    84,911.79x = 127,367.24 × 21,731.79
  4. Step 4: Simplify right side
    84,911.79x = 2,767,918,481.53
  5. Step 5: Solve for x
    x = 2,767,918,481.53/84,911.79
  6. Step 6: Final answer
    x = 32,597.57

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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.