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Finding the Fourth Proportional to 99,784.80, 149,245.20 and 89,330.40

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Solution

The fourth proportional to 99,784.80, 149,245.20 and 89,330.40 is: 133,608.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,784.80 : 149,245.20 = 89,330.40 : x
  2. Step 2: Convert to fraction form
    99,784.80/149,245.20 = 89,330.40/x
  3. Step 3: Cross multiply
    99,784.80x = 149,245.20 × 89,330.40
  4. Step 4: Simplify right side
    99,784.80x = 13,332,133,414.08
  5. Step 5: Solve for x
    x = 13,332,133,414.08/99,784.80
  6. Step 6: Final answer
    x = 133,608.86

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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.