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Finding the Fourth Proportional to 99,806.60, 149,609.10 and 49,809.80

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Solution

The fourth proportional to 99,806.60, 149,609.10 and 49,809.80 is: 74,664.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,806.60 : 149,609.10 = 49,809.80 : x
  2. Step 2: Convert to fraction form
    99,806.60/149,609.10 = 49,809.80/x
  3. Step 3: Cross multiply
    99,806.60x = 149,609.10 × 49,809.80
  4. Step 4: Simplify right side
    99,806.60x = 7,451,999,349.18
  5. Step 5: Solve for x
    x = 7,451,999,349.18/99,806.60
  6. Step 6: Final answer
    x = 74,664.39

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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.