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Finding the Fourth Proportional to 137,179.59, 189,297.05 and 76,745.49

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Solution

The fourth proportional to 137,179.59, 189,297.05 and 76,745.49 is: 105,902.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,179.59 : 189,297.05 = 76,745.49 : x
  2. Step 2: Convert to fraction form
    137,179.59/189,297.05 = 76,745.49/x
  3. Step 3: Cross multiply
    137,179.59x = 189,297.05 × 76,745.49
  4. Step 4: Simplify right side
    137,179.59x = 14,527,694,474.08
  5. Step 5: Solve for x
    x = 14,527,694,474.08/137,179.59
  6. Step 6: Final answer
    x = 105,902.74

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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.