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Finding the Fourth Proportional to 89,201.20, 133,801.80 and 87,818.80

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Solution

The fourth proportional to 89,201.20, 133,801.80 and 87,818.80 is: 131,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,201.20 : 133,801.80 = 87,818.80 : x
  2. Step 2: Convert to fraction form
    89,201.20/133,801.80 = 87,818.80/x
  3. Step 3: Cross multiply
    89,201.20x = 133,801.80 × 87,818.80
  4. Step 4: Simplify right side
    89,201.20x = 11,750,313,513.84
  5. Step 5: Solve for x
    x = 11,750,313,513.84/89,201.20
  6. Step 6: Final answer
    x = 131,728.20

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1.5x scale

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.