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Finding the Fourth Proportional to 137,183.70, 189,320.87 and 76,750.75

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Solution

The fourth proportional to 137,183.70, 189,320.87 and 76,750.75 is: 105,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,183.70 : 189,320.87 = 76,750.75 : x
  2. Step 2: Convert to fraction form
    137,183.70/189,320.87 = 76,750.75/x
  3. Step 3: Cross multiply
    137,183.70x = 189,320.87 × 76,750.75
  4. Step 4: Simplify right side
    137,183.70x = 14,530,517,432.79
  5. Step 5: Solve for x
    x = 14,530,517,432.79/137,183.70
  6. Step 6: Final answer
    x = 105,920.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.