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Finding the Fourth Proportional to 99,195.60, 148,663.80 and 39,982.80

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Solution

The fourth proportional to 99,195.60, 148,663.80 and 39,982.80 is: 59,921.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,195.60 : 148,663.80 = 39,982.80 : x
  2. Step 2: Convert to fraction form
    99,195.60/148,663.80 = 39,982.80/x
  3. Step 3: Cross multiply
    99,195.60x = 148,663.80 × 39,982.80
  4. Step 4: Simplify right side
    99,195.60x = 5,943,994,982.64
  5. Step 5: Solve for x
    x = 5,943,994,982.64/99,195.60
  6. Step 6: Final answer
    x = 59,921.96

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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.