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Finding the Fourth Proportional to 239,406.64, 359,191.98 and 81,745.81

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Solution

The fourth proportional to 239,406.64, 359,191.98 and 81,745.81 is: 122,646.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,406.64 : 359,191.98 = 81,745.81 : x
  2. Step 2: Convert to fraction form
    239,406.64/359,191.98 = 81,745.81/x
  3. Step 3: Cross multiply
    239,406.64x = 359,191.98 × 81,745.81
  4. Step 4: Simplify right side
    239,406.64x = 29,362,439,493.05
  5. Step 5: Solve for x
    x = 29,362,439,493.05/239,406.64
  6. Step 6: Final answer
    x = 122,646.72

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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.