Home / 89,623.70-134,435.55-85,687.10

Finding the Fourth Proportional to 89,623.70, 134,435.55 and 85,687.10

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Solution

The fourth proportional to 89,623.70, 134,435.55 and 85,687.10 is: 128,530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,623.70 : 134,435.55 = 85,687.10 : x
  2. Step 2: Convert to fraction form
    89,623.70/134,435.55 = 85,687.10/x
  3. Step 3: Cross multiply
    89,623.70x = 134,435.55 × 85,687.10
  4. Step 4: Simplify right side
    89,623.70x = 11,519,392,416.41
  5. Step 5: Solve for x
    x = 11,519,392,416.41/89,623.70
  6. Step 6: Final answer
    x = 128,530.65

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Similar ratio
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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.