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Finding the Fourth Proportional to 89,190.40, 133,720.80 and 36,572.80

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Solution

The fourth proportional to 89,190.40, 133,720.80 and 36,572.80 is: 54,832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,190.40 : 133,720.80 = 36,572.80 : x
  2. Step 2: Convert to fraction form
    89,190.40/133,720.80 = 36,572.80/x
  3. Step 3: Cross multiply
    89,190.40x = 133,720.80 × 36,572.80
  4. Step 4: Simplify right side
    89,190.40x = 4,890,544,074.24
  5. Step 5: Solve for x
    x = 4,890,544,074.24/89,190.40
  6. Step 6: Final answer
    x = 54,832.63

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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.