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Finding the Fourth Proportional to 87,637.70, 131,456.55 and 82,453.70

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Solution

The fourth proportional to 87,637.70, 131,456.55 and 82,453.70 is: 123,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,637.70 : 131,456.55 = 82,453.70 : x
  2. Step 2: Convert to fraction form
    87,637.70/131,456.55 = 82,453.70/x
  3. Step 3: Cross multiply
    87,637.70x = 131,456.55 × 82,453.70
  4. Step 4: Simplify right side
    87,637.70x = 10,839,078,936.74
  5. Step 5: Solve for x
    x = 10,839,078,936.74/87,637.70
  6. Step 6: Final answer
    x = 123,680.55

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1.5x scale

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.