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Finding the Fourth Proportional to 76,654, 114,981 and 21,250

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Solution

The fourth proportional to 76,654, 114,981 and 21,250 is: 31,875

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,654 : 114,981 = 21,250 : x
  2. Step 2: Convert to fraction form
    76,654/114,981 = 21,250/x
  3. Step 3: Cross multiply
    76,654x = 114,981 × 21,250
  4. Step 4: Simplify right side
    76,654x = 2,443,346,250
  5. Step 5: Solve for x
    x = 2,443,346,250/76,654
  6. Step 6: Final answer
    x = 31,875

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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.