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Finding the Fourth Proportional to 99,840.60, 149,660.10 and 49,843.80

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Solution

The fourth proportional to 99,840.60, 149,660.10 and 49,843.80 is: 74,715.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,840.60 : 149,660.10 = 49,843.80 : x
  2. Step 2: Convert to fraction form
    99,840.60/149,660.10 = 49,843.80/x
  3. Step 3: Cross multiply
    99,840.60x = 149,660.10 × 49,843.80
  4. Step 4: Simplify right side
    99,840.60x = 7,459,628,092.38
  5. Step 5: Solve for x
    x = 7,459,628,092.38/99,840.60
  6. Step 6: Final answer
    x = 74,715.38

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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.