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Finding the Fourth Proportional to 87,182, 130,773 and 21,518

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Solution

The fourth proportional to 87,182, 130,773 and 21,518 is: 32,277

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,182 : 130,773 = 21,518 : x
  2. Step 2: Convert to fraction form
    87,182/130,773 = 21,518/x
  3. Step 3: Cross multiply
    87,182x = 130,773 × 21,518
  4. Step 4: Simplify right side
    87,182x = 2,813,973,414
  5. Step 5: Solve for x
    x = 2,813,973,414/87,182
  6. Step 6: Final answer
    x = 32,277

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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.