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Finding the Fourth Proportional to 89,762.60, 133,584.33 and 86,772.75

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Solution

The fourth proportional to 89,762.60, 133,584.33 and 86,772.75 is: 129,134.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,762.60 : 133,584.33 = 86,772.75 : x
  2. Step 2: Convert to fraction form
    89,762.60/133,584.33 = 86,772.75/x
  3. Step 3: Cross multiply
    89,762.60x = 133,584.33 × 86,772.75
  4. Step 4: Simplify right side
    89,762.60x = 11,591,479,671.01
  5. Step 5: Solve for x
    x = 11,591,479,671.01/89,762.60
  6. Step 6: Final answer
    x = 129,134.85

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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.