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Finding the Fourth Proportional to 72,989.59, 100,728.48 and 41,157.82

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Solution

The fourth proportional to 72,989.59, 100,728.48 and 41,157.82 is: 56,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,989.59 : 100,728.48 = 41,157.82 : x
  2. Step 2: Convert to fraction form
    72,989.59/100,728.48 = 41,157.82/x
  3. Step 3: Cross multiply
    72,989.59x = 100,728.48 × 41,157.82
  4. Step 4: Simplify right side
    72,989.59x = 4,145,764,648.71
  5. Step 5: Solve for x
    x = 4,145,764,648.71/72,989.59
  6. Step 6: Final answer
    x = 56,799.40

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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.