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Finding the Fourth Proportional to 128,026.60, 192,039.90 and 88,660.60

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Solution

The fourth proportional to 128,026.60, 192,039.90 and 88,660.60 is: 132,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,026.60 : 192,039.90 = 88,660.60 : x
  2. Step 2: Convert to fraction form
    128,026.60/192,039.90 = 88,660.60/x
  3. Step 3: Cross multiply
    128,026.60x = 192,039.90 × 88,660.60
  4. Step 4: Simplify right side
    128,026.60x = 17,026,372,757.94
  5. Step 5: Solve for x
    x = 17,026,372,757.94/128,026.60
  6. Step 6: Final answer
    x = 132,990.90

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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.