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Finding the Fourth Proportional to 89,205.60, 133,765.20 and 49,720.80

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Solution

The fourth proportional to 89,205.60, 133,765.20 and 49,720.80 is: 74,557.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,205.60 : 133,765.20 = 49,720.80 : x
  2. Step 2: Convert to fraction form
    89,205.60/133,765.20 = 49,720.80/x
  3. Step 3: Cross multiply
    89,205.60x = 133,765.20 × 49,720.80
  4. Step 4: Simplify right side
    89,205.60x = 6,650,912,756.16
  5. Step 5: Solve for x
    x = 6,650,912,756.16/89,205.60
  6. Step 6: Final answer
    x = 74,557.12

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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.