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Finding the Fourth Proportional to 89,083.20, 133,624.80 and 87,700.80

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Solution

The fourth proportional to 89,083.20, 133,624.80 and 87,700.80 is: 131,551.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,083.20 : 133,624.80 = 87,700.80 : x
  2. Step 2: Convert to fraction form
    89,083.20/133,624.80 = 87,700.80/x
  3. Step 3: Cross multiply
    89,083.20x = 133,624.80 × 87,700.80
  4. Step 4: Simplify right side
    89,083.20x = 11,719,001,859.84
  5. Step 5: Solve for x
    x = 11,719,001,859.84/89,083.20
  6. Step 6: Final answer
    x = 131,551.20

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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.