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Finding the Fourth Proportional to 87,610, 131,420.02 and 28,450.72

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Solution

The fourth proportional to 87,610, 131,420.02 and 28,450.72 is: 42,677.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,610 : 131,420.02 = 28,450.72 : x
  2. Step 2: Convert to fraction form
    87,610/131,420.02 = 28,450.72/x
  3. Step 3: Cross multiply
    87,610x = 131,420.02 × 28,450.72
  4. Step 4: Simplify right side
    87,610x = 3,738,994,191.41
  5. Step 5: Solve for x
    x = 3,738,994,191.41/87,610
  6. Step 6: Final answer
    x = 42,677.71

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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.