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Finding the Fourth Proportional to 89,790.82, 133,626.08 and 86,800.84

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Solution

The fourth proportional to 89,790.82, 133,626.08 and 86,800.84 is: 129,176.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,790.82 : 133,626.08 = 86,800.84 : x
  2. Step 2: Convert to fraction form
    89,790.82/133,626.08 = 86,800.84/x
  3. Step 3: Cross multiply
    89,790.82x = 133,626.08 × 86,800.84
  4. Step 4: Simplify right side
    89,790.82x = 11,598,855,989.91
  5. Step 5: Solve for x
    x = 11,598,855,989.91/89,790.82
  6. Step 6: Final answer
    x = 129,176.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.