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Finding the Fourth Proportional to 89,045.70, 133,568.55 and 87,663.30

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Solution

The fourth proportional to 89,045.70, 133,568.55 and 87,663.30 is: 131,494.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,045.70 : 133,568.55 = 87,663.30 : x
  2. Step 2: Convert to fraction form
    89,045.70/133,568.55 = 87,663.30/x
  3. Step 3: Cross multiply
    89,045.70x = 133,568.55 × 87,663.30
  4. Step 4: Simplify right side
    89,045.70x = 11,709,059,869.22
  5. Step 5: Solve for x
    x = 11,709,059,869.22/89,045.70
  6. Step 6: Final answer
    x = 131,494.95

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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.