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Finding the Fourth Proportional to 71,550.56, 98,739.04 and 39,718.64

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Solution

The fourth proportional to 71,550.56, 98,739.04 and 39,718.64 is: 54,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,550.56 : 98,739.04 = 39,718.64 : x
  2. Step 2: Convert to fraction form
    71,550.56/98,739.04 = 39,718.64/x
  3. Step 3: Cross multiply
    71,550.56x = 98,739.04 × 39,718.64
  4. Step 4: Simplify right side
    71,550.56x = 3,921,780,383.71
  5. Step 5: Solve for x
    x = 3,921,780,383.71/71,550.56
  6. Step 6: Final answer
    x = 54,811.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.