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Finding the Fourth Proportional to 103,963.80, 155,556.45 and 74,047.20

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Solution

The fourth proportional to 103,963.80, 155,556.45 and 74,047.20 is: 110,793.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,963.80 : 155,556.45 = 74,047.20 : x
  2. Step 2: Convert to fraction form
    103,963.80/155,556.45 = 74,047.20/x
  3. Step 3: Cross multiply
    103,963.80x = 155,556.45 × 74,047.20
  4. Step 4: Simplify right side
    103,963.80x = 11,518,519,564.44
  5. Step 5: Solve for x
    x = 11,518,519,564.44/103,963.80
  6. Step 6: Final answer
    x = 110,793.56

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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.