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Finding the Fourth Proportional to 128,049.60, 191,685.60 and 114,052.80

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Solution

The fourth proportional to 128,049.60, 191,685.60 and 114,052.80 is: 170,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,049.60 : 191,685.60 = 114,052.80 : x
  2. Step 2: Convert to fraction form
    128,049.60/191,685.60 = 114,052.80/x
  3. Step 3: Cross multiply
    128,049.60x = 191,685.60 × 114,052.80
  4. Step 4: Simplify right side
    128,049.60x = 21,862,279,399.68
  5. Step 5: Solve for x
    x = 21,862,279,399.68/128,049.60
  6. Step 6: Final answer
    x = 170,732.90

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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.