Home / 89,846.20-134,591.10-78,765.40

Finding the Fourth Proportional to 89,846.20, 134,591.10 and 78,765.40

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Solution

The fourth proportional to 89,846.20, 134,591.10 and 78,765.40 is: 117,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,846.20 : 134,591.10 = 78,765.40 : x
  2. Step 2: Convert to fraction form
    89,846.20/134,591.10 = 78,765.40/x
  3. Step 3: Cross multiply
    89,846.20x = 134,591.10 × 78,765.40
  4. Step 4: Simplify right side
    89,846.20x = 10,601,121,827.94
  5. Step 5: Solve for x
    x = 10,601,121,827.94/89,846.20
  6. Step 6: Final answer
    x = 117,991.88

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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.