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Finding the Fourth Proportional to 72,719.60, 100,351.32 and 47,568.56

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Solution

The fourth proportional to 72,719.60, 100,351.32 and 47,568.56 is: 65,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,719.60 : 100,351.32 = 47,568.56 : x
  2. Step 2: Convert to fraction form
    72,719.60/100,351.32 = 47,568.56/x
  3. Step 3: Cross multiply
    72,719.60x = 100,351.32 × 47,568.56
  4. Step 4: Simplify right side
    72,719.60x = 4,773,567,786.50
  5. Step 5: Solve for x
    x = 4,773,567,786.50/72,719.60
  6. Step 6: Final answer
    x = 65,643.48

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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.