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Finding the Fourth Proportional to 87,401.80, 131,102.70 and 81,496.90

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Solution

The fourth proportional to 87,401.80, 131,102.70 and 81,496.90 is: 122,245.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,401.80 : 131,102.70 = 81,496.90 : x
  2. Step 2: Convert to fraction form
    87,401.80/131,102.70 = 81,496.90/x
  3. Step 3: Cross multiply
    87,401.80x = 131,102.70 × 81,496.90
  4. Step 4: Simplify right side
    87,401.80x = 10,684,463,631.63
  5. Step 5: Solve for x
    x = 10,684,463,631.63/87,401.80
  6. Step 6: Final answer
    x = 122,245.35

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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.