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Finding the Fourth Proportional to 163,399.56, 245,132.12 and 74,629.20

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Solution

The fourth proportional to 163,399.56, 245,132.12 and 74,629.20 is: 111,958.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,399.56 : 245,132.12 = 74,629.20 : x
  2. Step 2: Convert to fraction form
    163,399.56/245,132.12 = 74,629.20/x
  3. Step 3: Cross multiply
    163,399.56x = 245,132.12 × 74,629.20
  4. Step 4: Simplify right side
    163,399.56x = 18,294,014,009.90
  5. Step 5: Solve for x
    x = 18,294,014,009.90/163,399.56
  6. Step 6: Final answer
    x = 111,958.77

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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.