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Finding the Fourth Proportional to 137,652.21, 189,960.12 and 80,330.94

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Solution

The fourth proportional to 137,652.21, 189,960.12 and 80,330.94 is: 110,856.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,652.21 : 189,960.12 = 80,330.94 : x
  2. Step 2: Convert to fraction form
    137,652.21/189,960.12 = 80,330.94/x
  3. Step 3: Cross multiply
    137,652.21x = 189,960.12 × 80,330.94
  4. Step 4: Simplify right side
    137,652.21x = 15,259,675,002.11
  5. Step 5: Solve for x
    x = 15,259,675,002.11/137,652.21
  6. Step 6: Final answer
    x = 110,856.74

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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.