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Finding the Fourth Proportional to 72,157.80, 99,608.44 and 43,872.52

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Solution

The fourth proportional to 72,157.80, 99,608.44 and 43,872.52 is: 60,562.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,157.80 : 99,608.44 = 43,872.52 : x
  2. Step 2: Convert to fraction form
    72,157.80/99,608.44 = 43,872.52/x
  3. Step 3: Cross multiply
    72,157.80x = 99,608.44 × 43,872.52
  4. Step 4: Simplify right side
    72,157.80x = 4,370,073,276.07
  5. Step 5: Solve for x
    x = 4,370,073,276.07/72,157.80
  6. Step 6: Final answer
    x = 60,562.73

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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.