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Finding the Fourth Proportional to 103,699.80, 155,593.36 and 61,660.18

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Solution

The fourth proportional to 103,699.80, 155,593.36 and 61,660.18 is: 92,516.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,699.80 : 155,593.36 = 61,660.18 : x
  2. Step 2: Convert to fraction form
    103,699.80/155,593.36 = 61,660.18/x
  3. Step 3: Cross multiply
    103,699.80x = 155,593.36 × 61,660.18
  4. Step 4: Simplify right side
    103,699.80x = 9,593,914,584.40
  5. Step 5: Solve for x
    x = 9,593,914,584.40/103,699.80
  6. Step 6: Final answer
    x = 92,516.23

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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.