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Finding the Fourth Proportional to 128,676.18, 192,800.86 and 91,049.74

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Solution

The fourth proportional to 128,676.18, 192,800.86 and 91,049.74 is: 136,423.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,676.18 : 192,800.86 = 91,049.74 : x
  2. Step 2: Convert to fraction form
    128,676.18/192,800.86 = 91,049.74/x
  3. Step 3: Cross multiply
    128,676.18x = 192,800.86 × 91,049.74
  4. Step 4: Simplify right side
    128,676.18x = 17,554,468,174.78
  5. Step 5: Solve for x
    x = 17,554,468,174.78/128,676.18
  6. Step 6: Final answer
    x = 136,423.60

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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.