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Finding the Fourth Proportional to 128,010.20, 191,756.10 and 88,611.80

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Solution

The fourth proportional to 128,010.20, 191,756.10 and 88,611.80 is: 132,738.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,010.20 : 191,756.10 = 88,611.80 : x
  2. Step 2: Convert to fraction form
    128,010.20/191,756.10 = 88,611.80/x
  3. Step 3: Cross multiply
    128,010.20x = 191,756.10 × 88,611.80
  4. Step 4: Simplify right side
    128,010.20x = 16,991,853,181.98
  5. Step 5: Solve for x
    x = 16,991,853,181.98/128,010.20
  6. Step 6: Final answer
    x = 132,738.28

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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.