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Finding the Fourth Proportional to 72,321.66, 108,441.86 and 49,551.21

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Solution

The fourth proportional to 72,321.66, 108,441.86 and 49,551.21 is: 74,298.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.66 : 108,441.86 = 49,551.21 : x
  2. Step 2: Convert to fraction form
    72,321.66/108,441.86 = 49,551.21/x
  3. Step 3: Cross multiply
    72,321.66x = 108,441.86 × 49,551.21
  4. Step 4: Simplify right side
    72,321.66x = 5,373,425,129.89
  5. Step 5: Solve for x
    x = 5,373,425,129.89/72,321.66
  6. Step 6: Final answer
    x = 74,298.97

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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.