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Finding the Fourth Proportional to 87,336, 131,004 and 21,672

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Solution

The fourth proportional to 87,336, 131,004 and 21,672 is: 32,508

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,336 : 131,004 = 21,672 : x
  2. Step 2: Convert to fraction form
    87,336/131,004 = 21,672/x
  3. Step 3: Cross multiply
    87,336x = 131,004 × 21,672
  4. Step 4: Simplify right side
    87,336x = 2,839,118,688
  5. Step 5: Solve for x
    x = 2,839,118,688/87,336
  6. Step 6: Final answer
    x = 32,508

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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.