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Finding the Fourth Proportional to 87,649.80, 131,474.70 and 40,907.40

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Solution

The fourth proportional to 87,649.80, 131,474.70 and 40,907.40 is: 61,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,649.80 : 131,474.70 = 40,907.40 : x
  2. Step 2: Convert to fraction form
    87,649.80/131,474.70 = 40,907.40/x
  3. Step 3: Cross multiply
    87,649.80x = 131,474.70 × 40,907.40
  4. Step 4: Simplify right side
    87,649.80x = 5,378,288,142.78
  5. Step 5: Solve for x
    x = 5,378,288,142.78/87,649.80
  6. Step 6: Final answer
    x = 61,361.10

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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.