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Finding the Fourth Proportional to 89,171.35, 133,763.10 and 28,376.80

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Solution

The fourth proportional to 89,171.35, 133,763.10 and 28,376.80 is: 42,567.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,171.35 : 133,763.10 = 28,376.80 : x
  2. Step 2: Convert to fraction form
    89,171.35/133,763.10 = 28,376.80/x
  3. Step 3: Cross multiply
    89,171.35x = 133,763.10 × 28,376.80
  4. Step 4: Simplify right side
    89,171.35x = 3,795,768,736.08
  5. Step 5: Solve for x
    x = 3,795,768,736.08/89,171.35
  6. Step 6: Final answer
    x = 42,567.13

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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.