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Finding the Fourth Proportional to 103,945.30, 155,528.70 and 74,028.70

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Solution

The fourth proportional to 103,945.30, 155,528.70 and 74,028.70 is: 110,765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,945.30 : 155,528.70 = 74,028.70 : x
  2. Step 2: Convert to fraction form
    103,945.30/155,528.70 = 74,028.70/x
  3. Step 3: Cross multiply
    103,945.30x = 155,528.70 × 74,028.70
  4. Step 4: Simplify right side
    103,945.30x = 11,513,587,473.69
  5. Step 5: Solve for x
    x = 11,513,587,473.69/103,945.30
  6. Step 6: Final answer
    x = 110,765.83

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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.