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Finding the Fourth Proportional to 74,073.56, 111,076.31 and 40,782.56

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Solution

The fourth proportional to 74,073.56, 111,076.31 and 40,782.56 is: 61,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,073.56 : 111,076.31 = 40,782.56 : x
  2. Step 2: Convert to fraction form
    74,073.56/111,076.31 = 40,782.56/x
  3. Step 3: Cross multiply
    74,073.56x = 111,076.31 × 40,782.56
  4. Step 4: Simplify right side
    74,073.56x = 4,529,975,823.73
  5. Step 5: Solve for x
    x = 4,529,975,823.73/74,073.56
  6. Step 6: Final answer
    x = 61,155.10

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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.