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Finding the Fourth Proportional to 128,732.70, 192,807.45 and 76,244.70

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Solution

The fourth proportional to 128,732.70, 192,807.45 and 76,244.70 is: 114,194.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,732.70 : 192,807.45 = 76,244.70 : x
  2. Step 2: Convert to fraction form
    128,732.70/192,807.45 = 76,244.70/x
  3. Step 3: Cross multiply
    128,732.70x = 192,807.45 × 76,244.70
  4. Step 4: Simplify right side
    128,732.70x = 14,700,546,183.02
  5. Step 5: Solve for x
    x = 14,700,546,183.02/128,732.70
  6. Step 6: Final answer
    x = 114,194.34

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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.