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Finding the Fourth Proportional to 72,351.60, 108,642.60 and 49,081.20

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Solution

The fourth proportional to 72,351.60, 108,642.60 and 49,081.20 is: 73,699.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,351.60 : 108,642.60 = 49,081.20 : x
  2. Step 2: Convert to fraction form
    72,351.60/108,642.60 = 49,081.20/x
  3. Step 3: Cross multiply
    72,351.60x = 108,642.60 × 49,081.20
  4. Step 4: Simplify right side
    72,351.60x = 5,332,309,179.12
  5. Step 5: Solve for x
    x = 5,332,309,179.12/72,351.60
  6. Step 6: Final answer
    x = 73,699.95

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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.