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Finding the Fourth Proportional to 146,215.80, 218,805.30 and 99,559.80

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Solution

The fourth proportional to 146,215.80, 218,805.30 and 99,559.80 is: 148,986.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,215.80 : 218,805.30 = 99,559.80 : x
  2. Step 2: Convert to fraction form
    146,215.80/218,805.30 = 99,559.80/x
  3. Step 3: Cross multiply
    146,215.80x = 218,805.30 × 99,559.80
  4. Step 4: Simplify right side
    146,215.80x = 21,784,211,906.94
  5. Step 5: Solve for x
    x = 21,784,211,906.94/146,215.80
  6. Step 6: Final answer
    x = 148,986.72

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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.