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Finding the Fourth Proportional to 87,730.80, 131,401.80 and 72,178.80

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Solution

The fourth proportional to 87,730.80, 131,401.80 and 72,178.80 is: 108,108.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,730.80 : 131,401.80 = 72,178.80 : x
  2. Step 2: Convert to fraction form
    87,730.80/131,401.80 = 72,178.80/x
  3. Step 3: Cross multiply
    87,730.80x = 131,401.80 × 72,178.80
  4. Step 4: Simplify right side
    87,730.80x = 9,484,424,241.84
  5. Step 5: Solve for x
    x = 9,484,424,241.84/87,730.80
  6. Step 6: Final answer
    x = 108,108.26

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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.