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Finding the Fourth Proportional to 72,302.56, 108,442.64 and 19,716.32

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Solution

The fourth proportional to 72,302.56, 108,442.64 and 19,716.32 is: 29,571.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,302.56 : 108,442.64 = 19,716.32 : x
  2. Step 2: Convert to fraction form
    72,302.56/108,442.64 = 19,716.32/x
  3. Step 3: Cross multiply
    72,302.56x = 108,442.64 × 19,716.32
  4. Step 4: Simplify right side
    72,302.56x = 2,138,089,791.88
  5. Step 5: Solve for x
    x = 2,138,089,791.88/72,302.56
  6. Step 6: Final answer
    x = 29,571.43

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1.5x scale

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.